6. These are the tasks necessary for the final assembly of a hospital bed, the time needed to perform each task, and the operations that must be completed prior to subsequent operations. The time available is 300 minutes per day, and the required output rate is 25 beds per day.

a. Construct a precedence diagram.

b. Compute the desired cycle time.

c. Compute the theoretical number of process steps.

d. Balance the process using the longest activity time as a heuristic. If there is a tie, break it using the longest remaining time after the activity, that is, sum of the times of all its followers.

e. Compute the efficiency of the process.