a)Write a C program to find the number of digits, uppercase and lowercase letters and a total alphabet letters, in a sentence entered by the user. Define and use the following function for this job and print the results in main. (Do NOT use ctype functions) void countDULA (const char *, int *, int *, int *, int *); EXAMPLE OUTPUT 1: Enter a sentence: BaZZINGA! from S02E23 Number of digits = 3 Number of upper case letters = 8 Number of lower case letters = 6 Number of total alphabet letters = 14. b) Edit the conditional operations made in the function countDULA to use ctype functions. (Do NOT alter the main)