a$)$ Determine the expected completion time and variance for each activity.

b$)$ Determine the total project completion time and the critical path for the project.

c$)$ Dctermine ES$,$ EF$,$ LS$,$ LF$,$ and slack for each activity.

d$)$ What is the probability that McGee Carpet and Trim will finish the project in $40$ days or less?