Suppose the probability of a positive Hep C test result when Hep C is present is 0.89 and the probability of a negative test result when Hep C is not present is 0.72. Assume 1% of the population has Hep C. Create either a contingency table or a tree diagram for this problem. Then, find the probability of having Hep C and getting a positive test result. (1 point).