S1 Help

A golfer has 5 different clubs ina golf bag, only one of which is correct for the shot about to be played. The probability that the golfer plays a good shot if the correct club is chosen is 1/3. The probability of a good shot with an incorrect club is 1/4. The golfer chooses a club at random and plays the shot. Find the probability that;

a) a good shot is made
b) an incorrect club was used, given that a good shot is played

Thank you in advance for any help anybody an give me