solve the following problems

How many different samples of size n = 3 can be selected from a population with the following sizes. 1) N = 4 2) N = 8 3) N = 20 4) N = 50 B. Find the finite population correction factor given the following: 1) N = 200, n = 10 2) N = 2000, n = 10 3) N = 400, n =40 4) N = 500, n = 10 5) N = 200, n = 20