3) E6.2 d. Write a program that computes the sum of all odd numbers between a and b (inclusive), where a and b are inputs.

4) E6.4 c. Write a program that reads a line of input as a string and prints the string, with all vowels replaced by an underscore.

5) A variation of Exercise E6.18 Write a program that reads an integer and displays, using asterisks, a hollow square. For example, if the side length is 5