The following table details the tasks required for$$ Indiana$-$based Frank Pianki Industries to manufacture a fully portable industrial vacuum cleaner. The times in the table are in minutes. Demand forecasts indicate a need to operate with a cycle time of $10$ minutes.

$$

Activity

Activity Description

Performance Time$($mins$)$

Predecessors

A

Attach wheels to tub

$4\mathrm{.}0$

$$

B

Attach motor to lid

$1\mathrm{.}8$

$$

C

Attach battery pack

$2\mathrm{.}8$

B

D

Attach safety cutoff

$3\mathrm{.}8$

C

E

Attach filters

$3\mathrm{.}0$

B

F

Attach lid to tub

$2\mathrm{.}0$

$$A$,$ E

G

Assemble attachments

$3\mathrm{.}2$

$$

H

Function test

$3\mathrm{.}5$

$$D$,$ F$,$ G

I

Final inspection

$2\mathrm{.}0$

H

J

Packing

$2\mathrm{.}0$

I

Part $2$

$$a$-$b$)$ One of the possible assignment of tasks to workstations is shown correctly in

Fig. $2$

$.$

Part $3$

The efficiency of the assembly line with $3$ workstations$=$ enter your response here$\%($enter your response rounded to two decimal$$ places$).$