What is the expected time for activity $B?$

Time Estimates $($days$)$

Activity. Precedes Optimistic Most Likely. Pessimistic

Start

A$,$ B$,$ C

A

D

$38$

$50$

$62$

B

E

$90$

$97$

$108$

C

End

$85$

$100$

$115$

D

F

$19$

$25$

$31$

E

End

$91$

$98$

$115$

F

End

$62$

$65$

$68$

$99\mathrm{.}7$ days

$100$ days

$98\mathrm{.}0$ days

$98\mathrm{.}3$ days

$97\mathrm{.}7$ days