I got 66.4% for Part G but it is incorrect. Can someone tell me the correct answer?

Illinois Furniture, Inc., produces all types of office furniture. The "Executive Secretary" is a chair that has been designed using ergonomics to provide comfort during long work hours. The chair sells for $130. There are 480 minutes available during the day, and the average daily demand has been 50 chairs. There are eight tasks: Task Performance Time Task Must Follow (mins) Task Listed Below 5 A B 6 C 7 A, B D 5 C 7 D E F 8 E 7 G H E F, G 6 This exercise only contains parts b, c, d, e, f, and g. b) The cycle time for the production of a chair = 9.6 minutes (round your response to two decimal places). c) The theoretical minimum number of workstations = 6 (round your response up to the next whole number). d) The assignment of tasks to workstations should be: (Hint: Number workstations sequentially in terms of precedence relationships and combine any applicable tasks.) Task Workstation Number Station 1 B Station 2 C Station 3 D Station 4 Station 5 Station 6 I Station 7 Station 8 Were you able to assign all the tasks to the theoretical minimum number of workstations? No e) For this process, the total idle time per cycle = 13 minutes (enter your response as a whole number). f) The total actual idle time at all workstations over the course of an 8-hour work day for the process = 780.00 minutes (round your response to two decimal places). g) Given your answer in part (d), the efficiency of the assembly line = % (enter your response as a percentage rounded to one decimal place)