13. Two teams A and B play a soccer match, and we are interested in the winner. The sample space can be defined as: S = {a,b,d} where a shows the outcome that A wins, b shows the outcome that B wins, and d shows the outcome that they draw. Suppose that we know that (1) the probability that A wins is P(a) = P({a}) = 0.5 (2) the probability of a draw is P(d) P({d})=0.25. == (a) Find the probability that B wins. (b) Find the probability that B wins or a draw occurs. =