Use this information for the $4$ questions that follow. Hyland Plastics plans on using an existing layout to produce plastic forms for a new desk lamp.

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The productivity of each machine is given below.

Productivity

Machine

$($units$/$hour$)$

A

$16$

B

$20$

C

$13$

D

$12$

E

$15$

F

$18$

G

$30$

H

$28$