40-49 .1 90-99 .05 50-59 .15 100-109 .05 60-69 .2 110-120 0 Solve: a. If at least a 90 percent service level is to be provided for these printers: what is the order point? What is the safety stock? b. If the DDLT for the printer is actually normally distributed with a mean of 65 and a standard deviation of 10 and a 90 percent service level is to be provided for these printers: what is the order point? What is the safety stock? c. If the lead time for these printers is so stable that the lead time can be assumed to be a constant 6.5 days, the demand per day is normally distributed with a mean of 10 and a standard deviation of 2, and at least a 90 percent service level is to be provided for these printers: what is the order point? What is the safety stock? (Z (90%) =1.29)