Forty 17 and 18-year old students are the only people present at a party. The numbers of male and female students of each age are given in the following table. 17-year old 18-year old Male 9 13 Female 7 11 In the Grand Draw, each of the forty students has an equal chance of winning one of two prizes. The first prize is a gift token and the second prize is a box of chocolates. No student may win more than one prize. Find the probability that

(a) the gift token will be won by an 18-year old male student,

(b) both prizes will be won by female students,

(c) the box of chocolates will be won by a 17-year old student, given that the gift token is won by a 17-year old male student. (C)