I need help with E. I keep getting it wrong

As part of a major plant renovation project, the industrial engineering department has been asked to balance a revised assembly operation to achieve an output of 230 units per 7-hour day. Task times and precedence relationships are as follows: Immediate Predecessor Task a b C d e f g Duration (minutes) 0.3 0.4 0.3 0.3 1.6 1.5 1.6 a b - d e, f Do each of the following: a. Determine the number of followers for each task. Number of tasks following task a Number of tasks following task b Number of tasks following task c Number of tasks following task d Number of tasks following taske Number of tasks following taskf Number of tasks following task g b. Determine the minimum cycle time, the maximum cycle time, and the calculated cycle time. (Round all answers up to one decimal point. For example, round 1.83 up to 1.9.) Minimum cycle time Maximum cycle time Calculated cycle time minutes per unit minutes per unit minutes per unit c. Determine the minimum number of stations needed. (Use your rounded cycle time from Part b. Round up your answer to a whole number. Note that rounding up to one decimal point may reduce output to slightly less than 230 and this is fine.) Minimum number of stations d. Use the calculated cycle time. Assign tasks to workstations on the basis of most following tasks. Use shortest processing time as a tiebreaker. If ties still exist, assume indifference in choice. Work stations Following Tasks 1 II III IV e. Compute the percent idle time and percent efficiency for the assignment in part d. Note: if the calculated cycle time and the actual bottleneck station time are different, use the actual bottleneck time in your calculations. (Round your answers to 2 decimal places) % Idle percentage Efficiency %