The following table is an activity list that includes the duration and predecessor for a series of project activities.

What is the duration of the critical path $($in weeks$)?$

Activity Duration $($weeks$)$ Predecessor

A $2$ START

B $4$ A$,$ E

C $6$ A

D $3$ B$,$ C

E $7$ START

F $2$ E

END $-$ D $,$F

Question $2$

Consider the project described in question $1.$

What is the total slack for activity B$,$ assuming the project is finished in its minimum duration?

Question $3$

Consider the project described in question $1.$

Suppose the project is set to be completed in $18$ weeks. What is the total slack for activity A $($in weeks$)?$