Using the information in the table below and assuming an eight$-$hour workday and a desired output rate of $400$ units per day, calculate the minimum number of workstations required.

Task

Immediate predecessor

Task Time $($in minutes$)$

A

$-$

$0\mathrm{.}2$

B

A

$0\mathrm{.}2$

C

$-$

$0\mathrm{.}8$

D

C

$0\mathrm{.}6$

E

B

$0\mathrm{.}3$

F

D$,$ E

$1\mathrm{.}0$

G

F

$0\mathrm{.}4$

H

G

$0\mathrm{.}3$