Write a complete C program to perform number system conversions such as decimal to binary, decimal to octal, decimal to hexadecimal and vice-versa according to user's choice. Define functions to perform these various conversions and call them from the main function whenever needed. The program should display the following menu to the user for them to select one of the seven options listed. NUMBER SYSTEM CONVERSION MENU 1. DECIMAL TO BINARY 2. DECIMAL TO OCTAL 3. DECIMAL TO HEXADECIMAL 4. BINARY TO DECIMAL 5. OCTAL TO DECIMAL 6. HEXADECIMAL TO DECIMAL 7. EXIT Please enter your option