Question $1$: Is the critical path the longest path? Why? Explain it intuitively.

Question $2$: Can we have more than one critical path?

Question $3$: Suppose we have scheduled the project using the earliest start and finish times for each job. However, B happens to be delayed by one week, how will it affect other jobs and the completion of this project?

Question $4$: Suppose that A needs additional $2$ weeks and G additional $1$ week. What$$s the earliest time this project can be done?