Activity Predecessor Optimistic Most Likely Pessimistic

A $--91521$

B $--132123$

C A $6918$

D A $233547$

E B $192627$

F C $232941$

G D$,$ E $142026$

H F$,$ G $258$

Refer to the table above to answer the question that follows

What are the estimated expected completion $($mean$)$ times $($in weeks$)$ for activities A$-$H$?$