The following represents a project that should be scheduled using CPM:

IMMEDIATE PREDECESSORS

TIMES $($DAYS$)$

a

ACTIVITY

ABCDEFGH

A

$1$

m

b

$4$

$7$

$3$

$5$

$826236$

$2$

$5$

$2$

$11$

A

$1$

$9$

B

$1$

$3$

C$,$D

$1$

$11$

G

D$,$ E

$1$

$3$

F$,$G

$2$

$2$

$3$

b$.$ What is the critical path?

OA$-$D$-$G$-$H

OB$-$E$-$G$-$H

A$-$D$-$F$-$H

OA$-$C$-$F$-$H

c$.$ What is the expected project completion time?

Note: Do not round intermediate calculations. Round your answer to $3$ decimal places.

Project completion time

days