Answer all questions with explanation

Employee 1 at assembly line 1 made 15 products and two products were defective. Employee 2 at assembly line 2 made 20 products and four were defective.

(a) If 5 products from employee 2's assembly line 2 are tested what is probability that you will find more than one defective? chosen without replacement.

(b) If employee 2 gets $20 bonus when the inspector find no defectives, $5 when one defective and $0 when two or more defectives , find mean and variance of bonus.

(c) if 3 are selected from employee A and 4 from employee b find probability that more defectives from employee 1's products than employee 2's products