1. The accounting department at Weston Materials Inc., a natural manufacturer of unattached garages, reports that it takes two construction workers a mean of 30 hours and a standard deviation of 3 hours to erect the Red Barn model. Assume the assembly times follow the normal distribution.

A. Determine the z values for 27 and 35 hours

B. What percent of the garages take between 27 hours and 35 hours to erect?

C. What percent of the garages take between 31 hours and 36 hours to erect?

D. What percent of the garages take 29.3 hours or greater to erect?

E. Of the garages, 10% take how many hours to erect?