Given the diagram above $....$ What is the duration of the critical path?

Question $6$ options:

A$)$

$22$

B$)$

$27$

C$)$

$25$

D$)$

$28$

ID

Description

Predecessor

te

variance

critical

$1$

pilot production

none

$6$

$3$

yes

$2$

select channels of distrib

none

$17$

$4$

no

$3$

Develop mktg$.$ program

none

$6$

$2$

no

$4$

test market

$1$

$4$

$2$

yes

$5$

patent

$1$

$12$

$5$

no

$6$

full production

$4$

$14$

$10$

yes

$7$

Ad promotion

$3$

$7$

$2$

no

$8$

Release

$2,5,6,7$

$2$

$1$

yes