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Part $1$

The activities described by the following table are given for the J$.$C$.$ Howard Corporation in$$ Kansas:

Activity

Time

Immediate$$ Predecessor$($s$)$

A

$99$

minus$$

B

$77$

A

C

$33$

A

D

$66$

B

E

$99$

B

F

$44$

C

G

$66$

$$E$,$ F

H

$55$

D

I

$33$

$$G$,$ H