assume all date is bell shaped please show all work for this problem

2. Someone wants to know the mean weight of all garbage discarded in a city in a week. A random sample of n = 12 households was selected and the garbage weighed. The results follow 10.8 27.9 33.3 33.1 37.6 23.1 27.6 21.8 44.5 44.4 17.2 31.0 Find: a) The best point estimate of the mean weight of all garbage discarded in the city. b) A 90 % confidence interval estimate for the mean weight of all garbage discarded in the city. Answer this question numerically and also state the answer in a sentence. c) in part b, what is the margin of error of the estimate. d) What is the probability that the answer to part b is wrong? (Assuming your answer to part b was calculated correctly.)