i need help solving this problem

Students are reluctant to report cheating by other students. A student project put this question to a survey of 172 undergraduates at a large university: "You witness two students cheating on a quiz. Do you go to the professor?" Only 19 answered "yes." Give an 88% confidence interval for the proportion of all undergraduates at this university who would report cheating. A. Determine the critical value: since the confidence level is not on the provided table of eight values, make sure you sketch and label an appropriate curve and show the calculator function that you used. Write the critical value using two decimals. (3 points) B. Calculate the margin of error: show the formula that you used. Round the margin of error to four decimal places. (3 points) C. Calculate the confidence interval: show the formula that you used. Write the confidence as an interval containing p. (2 points) D. Interpret the results: Write the interval values using whole percent. (3 points)