(2) [a] An unbalanced die, with probabilities 13(1) = PIE) = 11.512, 13(3) = PM} = P(5) = 1,315, and P{} = 1/3, is tossed twice. Let X be the maximum of the two numbers which occur. Find ELK) and Var[X). {b} A box contains 12 marbles of which 7 are red and 5 are green. Four marbles are picked at random one by one without replacement. 1What is the probabilityr that the fourth one picked is the third red marble