Are x and y independent rv’s? explain. a service station has both self-service and full-service islands. on each island, there is a single regular unleaded pump with two hoses. let x denote the number of hoses being used on the self-service island at a particular time, and let y denote the number of hoses on the full-service island in use at that time. the joint pmf of x and y appears in the accompanying tabulation. y p(x, y) 0 1 2 0 .10 .04 .02 x 1 .08 .20 .06 2 .06 .14 .30 a. what is p(x 1 and y 1)?