In a 5 year randomized trial by Harvard Medical School researchers, 11037 subjects were taking aspirin every other day. and 11034 subjects were taking placebo, in the treatment group, 104 subjects had heart attacks during those 5 years; in the control group - 189 subjects. a) Test the hypothesis of equal proportions against two-sided alternative with Z-test based on Wilson's interval. What p- value do you get? Enter the number of the first significant digit in the p-value (for example, if you got 5.5 x 10^12, you have to enter 12). b) Calculate a 95% Wald's confidence interval for the decrease in probability of a heart attack associated with taking aspirin. What is its upper bound? Round the answer to 4 decimal points