Example: Crashing

If a project has $4$ critical paths: $A-B-C-D-E,A-F-G-H-E,A-J-K-E,$ and

A$-$K$-$L$-$M$-$E$.$ Each activity can be crashed $10$ times. How many weeks can you reduce the project

by if the activities have the following crashing costs:

Given the following project, what is the maximum possible reduction in project duration with a

crashing budget of $$2,000?$