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- Final review ch6-7 java Using arrays create a personal phone directory that contains room for first names and phone numbers for 20 people. Using the "names.txt" retrieve the first name and phone number for each person and store in arrays (parallel). Prompt the user for a name, search for the name, and if name is found in the array, display the corresponding phone number. If the name is not found, prompt the user to enter a phone number, and add the new name and phone number to the list. Continue to prompt the user for names until the user enters quit or until arrays are full. After the arrays are full (containing 20 names), do not allow the user to add new entries. Print the full list. "names.txt" Denton (123)-456-7890 Francis (123)-456-7891 Lucy (123)-456-7892 Brooklyn (123)-456-7899 Mattie (123)-456-7898 Clarissa (123)-456-7897 Bailey (123)-456-7896 Lesley (123)-456-7895 Tristan (123)-456-7894 Bethany (123)-456-7893A "peak" is an entry in an integer array that is bigger than or equal to the adjacent integers, while a "valley" is an element that is smaller than or equal to the surrounding numbers. In the array, for example, 5, 8, 6, 2, 3, 4, 6 are peaks while 5, 2 are troughs. Sort an array of numbers into an alternating series of peaks and troughs. EXAMPLEInput: {5, 3, 1, 2, 3}Output: {5, 1, 3, 2, 3}Java-.Selection and insertion sort 3.a Show steps of selection sort for the given array. You may need to add more rows to the table. Selection Sort Initial value 3 2 7 5 4 8 9 10 1 Search 0 . . . end 3 2 7 5 4 8 9 10 1 Swap index 0 Search 1 . . . end . . . 3.b Show steps of insertion sort for the given array. You may need to add more rows to the table. Insertion Sort Initial value 3 2 7 5 4 8 9 10 1 , first item is sorted 3 2 7 5 4 8 9 10 1 , first 2 items are…
- Final review ch6-7 Using arrays create a personal phone directory that contains room for first names and phone numbers for 20 people. Using the "names.txt" retrieve the first name and phone number for each person and store in arrays (parallel). Prompt the user for a name, search for the name, and if name is found in the array, display the corresponding phone number. If the name is not found, prompt the user to enter a phone number, and add the new name and phone number to the list. Continue to prompt the user for names until the user enters quit or until arrays are full. After the arrays are full (containing 20 names), do not allow the user to add new entries. Print the full list. "names.txt" Denton (123)-456-7890 Francis (123)-456-7891 Lucy (123)-456-7892 Brooklyn (123)-456-7899 Mattie (123)-456-7898 Clarissa (123)-456-7897 Bailey (123)-456-7896 Lesley (123)-456-7895 Tristan (123)-456-7894 Bethany (123)-456-7893(Horizontal and Vertical Stacking) Create the two-dimensional arrays array1 = np.array([[0, 1], [2, 3]]) array2 = np.array([[4, 5], [6, 7]]) a) Use vertical stacking to create the 4-by-2 array named array3 with array1 stacked on top of array2. b) Use horizontal stacking to create the 2-by-4 array named array4 with array2 to the right of array1. c) Use vertical stacking with two copies of array4 to create a 4-by-4 array5. d) Use horizontal stacking with two copies of array3 to create a 4-by-4 array6. Please use Python and keep it simpleUsing Python: 1. a. Write a program that creates an array (named numbers) of the integers 1,2,5,3,4,5. Then print the values of each item using its index. b. Write a program that reverses the order of the items of the array numbers and print the new ordered array. c. Write a program that prints the number of instances of (5) in the array numbers.
- Question 4: (30 marks) A Math teacher is teaching Math course to a set of classes (each class may have different number of students) and want to check the behavior of his students in a homework report. The teacher gave the classes the same exam and marked their answer and wants to know the class whose students got the highest average. Help the teacher in the required analysis of student’s marks by implementing a Java program ClassAverageMArks2DimmArray using 2-dimensional array to store the students marks and then compute the average of each class student’s marks. The program has the following specification: • A Method titled averageClassMarks for computing the average (as double) of a class students marks (given to the method as a single-dimensional array) • Another Method titled averageAllClassesMarks for computing the average (as single array of double) of all the classes class student’s marks (given to the method as a 2dimensional array). This method has to repeatedly call the…Java Instructions: Write a java program that stores these integers 10, 20, 30, 40, 20 in an array named nums. Write the code to count all the occurrences of 20 and then display the count. Add the code to create a new integer array that has twice the number of elements as nums and assign the values in nums to the new array. Display the new array. Try to think of a way for the program to calculate twice the number of elements for the new array.JAVA QUESTION 1 Using methods and arrays, write a program that • Creates an array A of size 100 integers. Fill the array with random values should be within the range 1 to 21 inclusive • Add a method to change the data and store it in another array based on the rule: if any item is divisible by 2 then add 2 and it is divisible by 3 then add 3 else add 5. prints it out in the two arrays 5 items per line. I NEED SCREEN SHOT
- Create a program that will encrypt letters and create a secret code. You will create an array of numbers from 0 - 25. use [i for i in range (26)] to create an array of numbers from 0 - 25. use random.shuffle to to shuffle the above array. This will be used for a new letter index order. For example: The first created array [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25] gets shuffled to become[2, 14, 12, 20, 16, 5, 11, 1, 13, 17, 15, 21, 19, 10, 23, 22, 25, 3, 6, 7, 18, 4, 9, 24, 0, 8] This will be used as the new index for the encrypted alphabet. create an array of letters using list(string.ascii_lowercase), this requires importing the string module. This will create: ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'] Accept an input of a word. Using the above tables take each letter of the word and convert it to the encrypted letter. Print each…Create a program that will encrypt letters and create a secret code. You will create an array of numbers from 0 - 25. use [i for i in range (26)] to create an array of numbers from 0 - 25. use random.shuffle to to shuffle the above array. This will be used for a new letter index order. For example: The first created array [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25] gets shuffled to become[2, 14, 12, 20, 16, 5, 11, 1, 13, 17, 15, 21, 19, 10, 23, 22, 25, 3, 6, 7, 18, 4, 9, 24, 0, 8] This will be used as the new index for the encrypted alphabet. create an array of letters using list(string.ascii_lowercase), this requires importing the string module. This will create: ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'] Accept an input of a word. Using the above tables take each letter of the word and convert it to the encrypted letter. Print each…Write this in Pseudocode and explain #10 – Write the pseudocode statements that will take the given array, multiply each value by 2, and save the results into a new array. Then, display every value in the new array using a loop. Constant Integer SIZE = 5 Declare Real myRealArray [SIZE] = 12.5, 13, 13.5, 14, 14.5 Write the pseudocode below: #11 – Do these statements evaluate to be true or false? NOT true evaluates to: true AND true evaluates to: false OR NOT false evaluates to: true OR false evaluates to: false AND false evaluates to: false OR true evaluates to: NOT false AND true evaluates to: (NOT (true OR false)) AND true evaluates to: (NOT true) OR (NOT false) evaluates to: NOT (false OR (NOT true)) evaluates to: (NOT ((false AND false) AND (true OR false)) OR (true OR NOT false)) evaluates to: #12a - Define what source code refers to: What is the file extension used for Python source code? #12b - Define what executable code…