1)Modify a telephone Program to accept any number of letters. which the output should display a hyphen after the first 3 digits and subsequently a hyphen(-) after every four digits. also modify it such that it can process as many telephone number as the user wants
2) write a program to calculate students average test scores and their grades. (i'll provide the data). program should use three array, a one- dimensional array to store student names, a (parallel) two-dimensional array to store the test score, and a parallel one-dimensional array to store grades.
The program must contain:
a method to read and store data into two arrays
a method to calculate the average test score and grade
a method to output the results
and having the program to output the class average