Please use the following to answer Question $12-15.$

What is the critical path$($s$)$ and the completion time for the project based on the normal plan?

a$.$ Path Design $-$ Software, $11$

b$.$ Path Wiring $-$ Software, $13$

c$.$ Path Chip install $-$ Testing, $12$

d$.$ Path Wiring $-$ Software $-$ Testing, $21$

e$.$ None of above