ste$3889$X$\_$ch$06\_244-299.$indd $29211/29/1909$:$56$ AM$292$Chapter SixProcess Selection and$$Facility Layout$1\mathrm{.}4$a$0\mathrm{.}5$b$0\mathrm{.}7$d$0\mathrm{.}6$c$0\mathrm{.}51\mathrm{.}0$g$0\mathrm{.}5$h$0\mathrm{.}8$ef$3.$ 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 using the