Consider the following data for a project to install a new server at the Northland Pines High School:

a$.$ Choose the correct network diagram below.

A$.$

B$.$

$c.$

D$.$

b$.$ Calculate the critical path for this project.

The critical path is A$-$C$-$F$-$H$-$J and the project duration is $24$ days. $($Enter your response as a whole number.$)$

c$.$ How much slack is in each of the activities $G,H,$ and I?