Sort an array of 10,000 elements using quicksort as follows: Sort the array using pivot as the middle element of the array. а. Sort the array using pivot as the median of the first, last, and middle elements of the array. b.

C++ Do the following lab by an array(not vector) for 3 students find the average of a student by asking him how many grades do you have. The answer to this question, determine the size of the array(list of grades) and then ask the user to enter grades(the number of the grades is equal to the size of the array) then calculate the average for each student. Hence, you will calculate 3 averages. to calculate the average, use the array accumulator. Also when you get each grade validate it. validation for grade means that you check whether a grade is between 0 and 100. if the grade is negative or a grade is more than 100 then it is not valid and you have to ask the user to enter a grade again. Find the maximum and minimum grades for each student. Print the sorted list of the grades for each student. example: if grades user entered are: 60 78 98 23 45 then sorted list is:23 45 60 78 98

Urgent answer quickly

d) Write a C++ program to find the missing number in an array containing numbers from 1 to 20. int arr[19] = {12, 13, 17, 1, 4, 9, 2, 20, 8, 3, 7, 10, 14, 15, 18, 6, 11, 16, 19};

C++set a array size = 7,user input 7 numberscalculate the average,median,modto keep the first one digits after the decimal point input output 2 6 3 7 5 1 4 Average = 4.0 Median = 4 Mod = / 3 7 2 1 8 7 5 Average = 4.7 Median = 5 Mod = 7

C++ Coding: Arrays Implement a 4x4 two-dimensional array of integers. Use a nested loop to populate the array with values 20 to 35 inclusive. Use a nested loop to output the array as a grid. Use a single loop to output all elements in the second row. Use a single loop to output all elements in the third column. Use a single loop to output all elements in the first diagonal (r==c). Use a single loop to output all elements in the opposing diagonal. Example Output: 20 21 22 2324 25 26 2728 29 30 3132 33 34 35Row 2: 24 25 26 27Col 3: 22 26 30 34Diagonal 1: 20 25 30 35Diagonal 2: 23 26 29 32