Please show all your work

A manager wants to assign tasks to workstations in order to achleve an hourly output rate of four units. The department uses a working time of 48 minutes per hour. a. Assign the tasks shown In the above precedence network (times are on the nodes and are In minutes) to workstations using the following heuristic rules: (I) "Assign the task with the largest positional weight." (II) Tiebreaker. "Assign the task with the longest time." a tle still exists, choose randomly. (Do not leave any empty spaces; Input a 0 wherever it is requlred.) b. What is the efficiency? (Do not round Intermedlate calculations. Round the final answer to 1 decimal place.) Efficlency