I am confused, please help :)

2. The following is a random sample of purchases at the drive-up window of a fast-food establishment: Cash Credit Card Credit Card Cash Credit Card Credit Card Credit Card Credit Card Credit Card Cash Credit Card Cash Credit Card Credit Card Cash Credit Card Cash Cash Credit Card Cash Credit Card Cash Cash Credit Card Credit Card Cash Credit Card Credit Card Credit Card Cash Cash Cash Credit Card Credit Card Credit Card Cash Our goal is to construct a 99% confidence interval for the population proportion of sales made with a credit card in this particular fast-food establishment. (Round the values to 2 decimal places. e.g.. 12.34) (3) Check the three assumptions. (b) Find out the three components for the 99% confidence interval. (c) Calculate and interpret the 99% confidence interval for the population proportion of credit card transactions. (d) Given the confidence level. can we say the population proportion differs from 0.3? (e) Suppose we decrease the confidence level. Can we say the true proportion is different from 0.3? (Answer this question without calculations.)