a$)$ A student plays two games of tennis. The probability that he wins the first

game is $\frac{3}{5}.$

If he wins the first game, the probability that he wins the second is $\frac{2}{3}.$ If he

does not win the first game, the probability that he wins the second

is $\frac{7}{10}.$

i$.$ Draw and label a tree diagram.

ii$.$ Find the probability that he wins exactly one game.