a$.$ Create a small java program section with a for loop which inputs $10$ numbers, and

calculates their sum, then prints the sum.

b$.$ Convert the for loop in part a$,$ into a while loop to do the same task

c$.$ Convert the for loop in part a$,$ into a do while loop to do the same task.

Using an array, input $20$ values from the user, calculate the average and print how many

values are under the average.