$32\%$ of the books in a large library are out of print

iv$.$ What is the mean $($or expected value$)$ of the number of books in the library that are out of print in a sample of size

a$.10?$

b$.20?$

v$.$ What is the standard deviation of the number of books in the library that are out of print for a sample of

a$.10?$

b$.20?$