Chapter $6,$ problem $3$

A manager wants to assign tasks to workstations as efficiently as possible and achieve an hourly output of four units. The department uses a working time of $56$ minutes per hour. Assign the tasks shown in the accompanying precedence diagram $($times are in minutes$)$ to workstations in order of most following tasks, tiebreaker: greatest positional weight. Which task$($s$)$ will be assigned to workstation $2?$

a

b

c

d

e

f

g

h

i