C CODE

1. (10 pts) Write a program using putchar () and getchar ) that reads characters form the keyboard and write to the screen. Every letter that is read should be written three times and followed id be disregarded. All other characters should ju to the screen 2. (20 pts) Write a program that reads characters from the keyboard and writes to the screen. Write all vowels as uppercase letters and all nonvowels as lowcase letters. (Hint: Write a function isvowel () that tests whether or not a character is a vowel.)