Please Help ASAP! Not sure why four values in red are wrong

A manager wants to assign tasks to workstations as efficiently as possible and achieve an hourly output of 32 units. Assume the shop works a 60-minute hour. Assign the tasks shown in the accompanying precedence diagram (times are in minutes) to workstations using the following rules: 0.5 0.8 1.9 0.8 0.6 f 0.6 a b d h 0.9 0.7 g e Return to question a. What is Cycle time? (Round your answer to 1 decimal place.) Answer is complete and correct. Cycle time 1.9 minutes In order of most following tasks. Tiebreaker: greatest positional weight. (Use your rounded cycle time. Enter your tasks in the order they were assigned at each station as a letter between a and h in lowercase with no other text or symbols. Round your numerical answers to 1 decimal place.) Answer is complete but not entirely correct. Work Station Task Task Time Time Remaining 0.0 1 a II b 1.1 e 0.4 III 1.3 d f OOOooooo 1.9 0.8 0.7 0.6 0.8 0.5 0.9 0.6 OOOOOO 0.5 X 0.0 X IV g h 1.0 0.4 What is Efficiency? (Use your rounded cycle time in the denominator of your efficiency calculation. Round your answer to 1 decimal place.) Answer is complete and correct. Efficiency 89.5% b. In order of greatest positional weight. Tiebreaker: most following tasks. (Use your rounded cycle time. Enter your tasks in the order they were assigned at each station as a letter between a and h in lowercase with no other text or symbols. Round your numerical answers to 1 decimal place.) Answer is complete but not entirely correct. Task Task Time Work Station 1 a 1.9 Time Remaining 0.0 1.1 0.4 11 0.8 bo e d 0.7 III = 0.6 1.3 0.5 % f 0.8 0.5 0.0 X IV g 0.9 1.0 0.4 h 0.6 What is Efficiency? (Use your rounded cycle time in the denominator of your efficiency calculation. Round your answer to 1 decimal place.) Answer is complete and correct. Efficiency 89.5 %