A small software development project at Krishna Dhir's firm has five major activities. The times are estimated and provided in the table below.

$\backslash$table$[[$IMMEDIATE$,,,,],[$AREDECESSOR$,$a$,$m$,$b$,],[$A TIVITY,PRED,$1,7,13],[$B$,-,5,8,17],[$C$,$A$,8,14,20],[$E$,$B$,4,7,16]]$

a$)$ Find the expected completion cientrar this project.

The expacted completion time for the project is $($ente$,$ woy response as a whole number$).$

b$)$ What variance value would be used to find probabilitios iof fing by certain time?

The project variance value of completion time is $($enterseronse as a whole number$).$