Consider the network described in the table below.

Immediate Optimistic Likely Pessimistic

Activity Predecessor$($s$)$ Time $($days$)$ Time $($days$)$ Time $($days$)$

W none $4614$

H none $71013$

C W $357$

G H $468$

E H $333$

F C$,$E $1410$

What is the probability of completing the project in $15$ days or less?