Q$3$: A construction project is broken down into the following activities:

a$.$ Amy drew a network diagram for this project, but she missed an arrow from node

to

node

$(2$ points$)$

a$.$ In the complete network diagram, find the critical path$($s$)$ and explain your reasoning. $(4$

points$)$

b$.$ What is the project duration? $(2$ points$)$

c$.$ How much slack does activity A have? $(1$ point$)$ Suppose that activity B starts at time $0$

and activity A starts at time $0\mathrm{.}5.$ How long $($at most$)$ can activity A be delayed without

affecting the current project duration? $(1$ point$)$

d$.$ Suppose that the goal is to reduce the project duration to $10$ days. Fill in the Daily Crash

Cost in the table below $(2$ points$).$ Explain, step by step, which tasks to crash, and

compute the resulting total cost of reducing the project duration to $10$ days. $(8$ points$)$