Please answer and explain. Thanks

A company is designing a product layout for a new product. It plans to use this production line eight hours a day in order to meet projected demand of 480 units per day. The tasks necessary to produce this product: TASK PREDECESSOR TIME(seconds) u 30 V u 30 W u 6 W 12 y 54 Z V, 30 If the company desires that output rate equal demand, what would the percentage idle time of this line be with the minimum number of workstations? Select one: O a. 1% O b. 10% O c. 7.5% O d. 0% e. 12.5%