QUESTION 20 Currently, the average time between failures of a part is 100 hours and the average repair time is 4 hours. A designer estimates that she can (a) increase the average time between failures by 5 percent at a cost of $450, or (b) reduce the average repair time by 10 percent at a cost of $200. Which option of the two would be more cost-effective? Option a Option b They are the same No enough information