Activity Immediate Predecessor a $($days$)$ m $($days$)$ b $($days$)$

A $-258$

B $-369$

C A $4710$

D B $2514$

E C $333$a$)$ What is the expected completion time for this project?

b$)$ What variance value would be used in finding possibilities of finishing by a certain time?

c$)$ What is a probability if the project time exceed $2$ days after completion time?