One hundred patients who had either ankle surgery or knee surgery were asked whether they were satisfied or dissatisfied regarding the result of their treatment. The following table summarizes their response. Surgery Satisfied Dissatisfied Total ankle 30 15 45 knee 43 12 55 Total 73 27 100 If one person from the 100 patients is selected at random, determine the probability that the person a) was satisfied given that the person had knee surgery. (3 marks) b) was dissatisfied given that they had ankle surgery (3 marks) C) had knee surgery given that they were dissatisfied (4 marks)