In a certain town, a random sample of executives have the following personal incomes (in thousands); Assume the population of incomes is normally distributed. Find the 95% confidence interval for the mean income.

See Below for Excel for Data. 35 43 29 55 63 72 28 33 36 41 42 57 38 30

a) 32.180 < < 55.543

b) 35.132 < < 50.868

c) 40.840 < < 45.160

d) 39.419 < < 46.581

e) 35.862 < < 50.138