The estimated times and immediate predecessors for the activities in a project at Howard Umrah's retinal scanning company are given in the following table. Assume that the activity times are independent. Time $($weeks$)$ImmediateTime $($weeks$)$ImmediateActivityambPredecessor$($s$)$ActivityambPredecessor$($s$)$A$9910101111$long dashC$99991313$AB$4411111818$long dashD$5510101414$B This exercise contains only parts a$,$ b$,$ c$,$ d$,$ and e$.$Part $2$a$)$ Based on the activity time estimates, the expected times and variance for each of the activities are $($round your response to two decimal places$)$:Part $3$Part $4$Part $5$ActivityExpected TimeVarianceA enter your response here enter your response hereB enter your response here enter your response hereC enter your response here enter your response hereD enter your response here enter your response here Part $6$b$)$ The expected completion time of the critical path $=$ enter your response here weeks $($round your response to two decimal places$).$Part $7$The expected completion time of the path other than the critical path $=$ enter your response here weeks $($round your response to two