3a. Write a program that reads a social security number written as contiguous
digits (for instance, 509435456), uses the charAt method to obtain
each character and then prints each digit on a separate line followed by a
colon and the digit printed the number of times equal to its value. Thus the
output for 509435456 would be
5:55555 0: 9:999999999 4:4444 3:333 5:55555 4:4444 5:55555 6:666666
Hint: Use a char variable, e.g., index, for the inner loop
control variable and write the inner for loop as for(char index = '1';
index <= digit; index++) where digit is the char
variable use to store the digit taken from the string.
3b. Write the program so that index is an int variable. This means you must convert the character assigned to digit to an int.