Textbook Question $-2$D$/3$

Given the table below $($see picture$)$:

If the indirect cost savings is $$1,300,000$ per week

a$)$ Draw the network diagram

b$)$ What is the critical path?

c$)$ Provide the steps and process to crash this project

d$)$ What is the maximum time that this project can be crashed, what is the total crashing cost, and what is the new duration?

e$)$ Provide the final network diagram $($using the maximum crash time$)$