need asap just a-c thank you

18. Refer to Exercise I and answer the following questions: a. Given that X = 1. determine the conditional pmf of Y-i.e., py (0 1), Pr x(]| 1), and py (2 1). b. Given that two hoses are in use at the self-service island, what is the conditional pmf of the number of hoses in use on the full-service island? c. Use the result of part (b) to calculate the conditional probability P(Y = 1 X = 2). d. Given that two hoses are in use at the full-service island, what is the conditional pmf of the number in use at the self-service island