Task

Performance

Time$($mins$)$

Predecessors

A

$2$

minus

B

$2$

A

C

$1$

A

D

$1$

C

E

$3$

C

F

$1$

C

G

$1$

$$D$,$ E$,$ F

H

$2$

B

I

$1$

$$G$,$ H

Part $2$

$$a$)$ The correct precedence relationship with one of the possible assignment of tasks to workstations is shown in

Fig. $2$

$.$

Part $3$

$$b$)$ The operating efficiency of the assembly line with $5$ workstations shown in the figure chosen above$=$

$$

enter your response here$\%($enter your response as a percentage rounded to one decimal$$ place$).$