A project superintendent is about to begin work on a freeway resurfacing project, which is comprised of the following five activities:

ACTIVITY

Start

A

B

C

$D$

E

PRECEDES

A$,$ E

B$,$ C

$D$

End

End

End

DURATIONS $($weeks$)$

$\frac{t_m}{20}$

$5$

$30$

$10$

$40$

$31$

$t_0{?}_{?}$

$2$

$18$

$7$

$1$

V

H$.$

What is the estimated expected $($mean$)$ duration for project completion?

Select one:

a$.35$ weeks

b$.39$ weeks

c$.50$ weeks

d$.104$ weeks

e$.105$ weeks

Check