7) Use a variation model to solve for the unknown value. The time required to complete a job varies inversely as the number of people working on the job. It takes 3 people 16 days to do a job. (a) How many days will it take if 10 people work on the job? Round answer to one decimal place, if necessary. (b) If the contractor wants to complete the job in 3 days, how many people should work on the job? Round answer up to the next whole number, if necessary. A) a) 5 days b) 16 people B) ) a) 4.8 days b) 16 people C) ) a) 4.8 days b) 15 people D) None