Activity

Precedes

Optimistic

Most Likely

Pessimistic

Start

A$,$B$,$C

$-$

$-$

$-$

A

D

$38$

$50$

$62$

B

E

$90$

$99$

$108$

C

End

$85$

$100$

$115$

D

F

$19$

$25$

$31$

E

End

$91$

$100$

$115$

F

End

$62$

$65$

$68$

What is the estimated expected $($mean$)$ time for activity E$?$

A$.$

$99$ days

B$.$

$101$ days

C$.$

$91$ days

D$.$

$115$ days

E$.$

$100$ days