Kelle Carpet and Trim installs carpet in commercial offices. Peter Kelle has been very concerned with the amount of timeit took to complete several recent jobs. Some of his workers are veryunreliable. A list of activities and their optimistic completion time,the most likely completion time. and the pessimistic completiontime $($all in days$)$ for a new contract are given in the following table:

TIME $($DAYS$)$

ACTIVITY

K

$6$

mCWN$5$

$10142$

m

$6$

$168$

$84$

moo

O

$14$

$122010$

IMMEDIATEPREDECESSOR$($