OPRE $3310$: Homework Asslgument $2$ OPRE $3310$: Homework Assignment $2$ Q$2(12$ points$)$ The network diagram of a project is shown below. a$.$ Use two$-$pass method to determine the critical path $($you can show the different times in the above diagram if you like$).(4$ points$)$ b$.$ What is the project duration? $(1$ point$)$ c$.$ What is the slack time of activity F$?(1$ point$)$ d$.$ Activities A$,$ B$,$ C$,$ D can be crashed. The normal time, crash time, normal cost and crash cost are shown in the table below. What is the daily crash cost of each activity? $(2$ points$)$ e$.$ The project needs to be completed in $22$ days. How can you achieve this goal at minimum cost? Please report your crashing steps in the table below. $($The table size does not imply the number of steps that will be needed.$)[4$ points$)$