4. Write a C program that will do the following a) Define a holistic structure named Veli that contains an integer. x, and a real number. b) Define a bolistic structure named Mehmet, which has a variable z from the Veli structure, plus a string (20 characters), name, inside it. c) In the main program, define two variables named pl and p2 from Mehmet structure and read the content (information) of p1 from the keyboard. d) If the entered character string of pl is a 5-character string containing 3 vowel (vowel) letters. (a, e, i, o, u), then copy the entire contents of pl to p2. Otherwise read the content of p2 from the keyboard e) Show the full contents of variables pl and p2 on the screen