Please help. I'm not sure why I'm not getting the right answer. Thanks!

PS.74 Bell computer is planning to launch a new high-end server. Nine steps or tasks are required to assemble this computer. Daily demand is expected to be 78 units and there are three 8-hour shifts available each day to meet this production quota. Task Req'd Time (in minutes) Predecessor | | 12 None B 13 A | | 6 | | DL 5 B E 16 A 4 CD 11 F 16 L E 4 L GH What is the total time (in minutes) to produce one server? 87 What is the takt time (in minutes) for this production line? (Round your answer to a one decimal place.) 18.5 What is the theoretical minimum number of workstations required for this production line? (Round up your answer to the nearest whole number.) 5 After assigning task A to workstation 1, which task (or tasks) should you assign to workstation 2? 0 0 0 0 0 Bor E Cand D 0 Suppose you assign task B to workstation 2, which task (or tasks) should you then assign to workstation 3? C, D and F C and D OE E (by itself), or C, D and F E and H Assume you assign tasks C, D and F to workstation 3, task E to workstation 4, which task (or tasks) should you assign to workstation 5? Gand I G and H Hand OO II Given your task assignments to workstations, what is the actual number of workstations required? What is the cycle time in minutes) for this production line? 16 o What is the combined idle time (in minutes) for this production line? 153 0 What is the overall efficiency for this production line? (Write your answer as a percentage, and display your answer to two decimal places.) 90.63 %