please, solve this 2 Precedence diagram problems with en explanation.

Using the information contained in the table shown, do each of the following: Task Performance Time (in min) Task must follow task listed bellow A9 B7 A C5 B D4 B E 6 A F3 CD G|7 F H11E 13 G, H a. Draw a precedence diagram. Assuming 520 available minuts per day, compute the cycle time needed to obtain an output of 40 units per day. Determine the minimum number of workstations required. b. Assign tasks to workstations using this rule: Assign tasks according to greatest number of following tasks. In case of a tie, use the tiebreaker of assigning the task with the longest processing time first. c. Compute the resulting percent idle time and efficiency of the system The given in the table below tasks form a precedence diagram and need to be assigned to workstations by a cycle time of 1.7 minutes. Assign the tasks according to the greatest positional weight. In case of the tiebreaker will be the greatest number of followers. Find the efficiency. Task Length (minutes) Follows Task (Immediate predecessor) a b a b 0 0 d e 0.4 0.5 0.9 0.6 0.1 0.2 0.4 0.1 0.2 0.7 0.3 f g h i j k d, e f h