$1)$ Determine the completion time, critical path, and slack times for the following PERT$/$CPM network.$$ Solve by hand on a separate piece of paper.

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Act$$ I.P$.$ Time$$ Slack

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A$--7$ Completion Time$\_\_\_\_\_\_\_\_\_\_\_\_$

B$--5$

C$$ A$12$ Critical Path $\_\_\_\_\_\_\_\_\_\_\_\_$

D$$ A$8$

E$$ A$2$

F$$ B$5$

G$$ B$9$

H$$ D$9$

I$$ E$,$F$6$

J$$ G$,$I$7$