Questions about a sample chosen from a large population.

Hi guys i got this question i do not understand how to answer it..(Wondering)

Lettrman or leno? Who is the king of late night tv ? An

Internet survey estimates that,when given a choice between David

Letterman and Jay leno , 52% of the population prefers Jay Leno.

Suppose that you select three people randomly and ask them which

host they prefer.

A) Find the Probability distribution

for X, the number of people in the sample of three who would prefer

Jay Leno ?

C) What is the probaility that exactly

one of the Three would prefer Jay Leno ?

D) What are the population mean and

standard deviation for the random variable x?