There are eight balls in an urn. They are identical except for color. Four are red, three are blue, and one is yellow. You are to draw a ball from the urn, note its color, and set it aside. Then you are to draw another ball from the urn and note its color. (a) Make a tree diagram to show all possible outcomes of the experiment. (b) Let P(x, y) be the probability of choosing an x-colored ball on the first draw and a y-colored ball on the second draw. Compute the probability for each outcome of the experiment. (Enter your answers as fractions.) P(R, R) = P( R, B) = P ( R , n) = P (B, R) = P (B , B ) = P ( B , n) = P ( Y , R ) = P (Y, B ) =