show all work

16. A survey is conducted which takes a random sample of 400 UVU students. The survey asks whether or not they are in favor of a $10 increase in student fees to fund an expanded intramural program. Of the 73 responses, 85% responded they are in favor of the $10 student fee increase to fund expanded intramurals. More than 80% of the sampled UVU students did not respond. Any errors due to the nonresponses (1.5 pts) a. Are in addition to the random variation accounted for by the announced margin of error. b. Can be accounted for with a 99% confidence interval. c. Have no effect on the accuracy of the confidence interval. d. Are included in the margin of error