There is an $80$ percent chance the following project can be completed in X weeks or less.

A network diagram flowchart. The flows are as follows. A$,$ B$,$ and D$.$ A$,$ C$,$ and E$.$

ACTIVITY MOST OPTIMISTIC MOST LIKELY MOST PESSIMISTIC

A $2514$

B $144$

C $417$

D $4611$

E $4914$

What is X$?$