Write a program that reads data from a file specified by the user at runtime (i.e. your program should accept the filename as user input) and stores the output in the file Ch3_Ex5Output.dat. To test your program, use the Ch3_Ex5Data.txt file.

Write a program that reads the data of numbers shown below, does some math, then displays the output below on the screen. And then edit the program to also write the results of the first program to a different file. (Note: not to input the data of numbers you used in the first program, because that would replace your data.) You must write a program using the specified code below.   Write a code using the following : def main():       # Add code that reads the numbers,       # Calculate the total number of pets.,       # the average #, the minimum #, the maximum #       # displays those numbers as specified in the instructions. main()   The required output of the first program: The total Number of families: The total number of kids: The average number of kids per family: The maximum number of kids in a family: The minimum number of kids in a family:   Data of numbers: 6319220021214151

Exercise 2: Write a Python program that reads from each line of an input file called grades.txt, a student id followed by the student grades in 3 exams. The program will then calculate the average of the student and save in a file called results.txt the student id followed by the calculated average. For example, if the grades.txt contains S111 60 60 90 S222 89.5 90 89 S333 42 50 43 The file results.txt will contain S111: 70.00 S222: 89.50 S333: 45.00

Create a new file (in Dev C++) and save it as lab7_XYZ.cpp (replace XYZ with your initials). In Lab 2, you created a menu for a simple calculator program. In Lab 6, you added some functionality based on the user selection. In this lab, you will add some more functionality to the program. Use loops to keep running the program until the user chooses the exit condition (9). When dividing, use a loop to validate user input, making sure the denominator (second number) is not zero. If the user enters a 0 for the second number, display an error message and keep prompting until a non-zero number is entered. 1)   Add two numbers2)   Subtract two numbers3)   Multiply two numbers4)   Divide two numbers 9)   Exit program The program should: contain header comments as shown in class display a hello message before presenting the menu display the menu prompt user for selection echo the selection back to the user if the selection was invalid, display error message to user and then loop back to menu…