calculate calculate calculate calculate 1. The joint probability mass function (pmf) of X(x=10,11,12) and Y(y=5,6) is given by a. Find the marginal pmf for X and Y; that is find fX(x) and f(y). (You can just write them in the table.) b. Are X and Y independent? Support your answer. c. (4 points) Compute P(XY60)..