1. Write a value returning function that receives three integers and returns the largest of the three. Assume the integers are not equal to one another.

2. Write a value returning function that receives two floating point numbers and returns true if the first formal parameter is greater than the second.

3. Write a value returning function that receives a character and returns true if the character is a vowel and false otherwise. For this example, vowels include the characters 'a', 'e', 'i', 'o', and 'u'.