How would you find the normal approximation to the binomial probability P(x = 4) in part A ...

Answer the following: 

 A. Find the binomial probability P(x = 4), where n = 12 and p = 0.50
 

B. Set up, without solving, the binomial probability P(x is at most 4) using probability notation.

 C. How would you find the normal approximation to the binomial probability P(x = 4) in part A. Show how you would calculate the mean and standard deviation in the formula for the normal approximation to the binomial, and show the final formula you would use.