You have been called in as a consultant toset up a kanban control system. the first thing to do is to determine the number of kanban card sets needed. your research shows that the expected demand during lead time for a particular component is 150per hour. you estimate the safety stock should be set at 25% of the demand during lead time. the tote trays used as containers can hold 8 units of stock and the lead time it takes to replenish an order is 2 hours. which of the following is the number of kanban card sets necessary to support this situation? a. 42b. 47c. 68d. 89e. 9455.