Best Sleep Inc. manufactures custom pillows. Five jobs are waiting to be processed. Job A has a flow time of 8 days, job B has a flow time of 10 days, job C has a flow time of 15 days, job D has a flow time of 20 days, and job E has a flow time of 27 days. What is the mean flow time? a) 8 days b) 10 days c) 7 days d) 0 days e) 16 days