Activity Immediate Predecessor Optimistic Time

$($Hr$.)$ Most Likely Time $($Hr$.)$ Pessimistic Time

$($Hr$.)$

A $3411$

B A $222$

C A $339$

D B $357$

E B $555$

F C $456$

G E$,$F $123$

H D $129$

I G$,$H $3411$