Read numbers from file and calculate sum and average

Write a program to read numbers from a file and calculate the averages. The program asks the user to enter the input file name where the numbers are stored. Make sure to display an error message if the file does not exist. Read the first number. It';s the group size. Read subsequent numbers for the group size. Add them and calculate the average. Display the group size, the first number, the sum and the average. Repeat until the end of the file. For example, the data are stored in a file named [login to view URL] containing the following: 2 1 2 3 1 2 3 4 1 2 3 4 Sample run: Enter an input file name: [login to view URL] Group Size = 2 i = 1 number = 1 Sum = 1 i = 2 number = 2 Sum = 3 Average = 1.50 Group Size = 3 i = 1 number = 1 Sum = 1 i = 2 number = 2 Sum = 3 i = 3 number = 3 Sum = 6 Average = 2.00 Group Size = 4 i = 1 number = 1 Sum = 1 i = 2 number = 2 Sum = 3 i = 3 number = 3 Sum = 6 i = 4 number = 4 Sum = 10 Average = 2.50