Please answer both questions and show working. Please do not copy previous Chegg answers. I will upvote for accurate answers, thank you!

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Consider the following work breakdown structure: Activity Start - U V Duration Estimates (Days) Precedes Optimistic Most Likely Pessimistic U,V W 35 50 65 W,X 28 40 52 Z 26 35 44 Y 28 40 52 Z 26 29 38 End 36 60 84 W X Y Z What is the estimated standard deviation in the time for activity Z? What is the estimated standard deviation in the time for activity Z? Multiple Choice 2 days O 3 days O 5 days O O 4 days O 8 days Consider the following work breakdown structure: Time Estimates (days) Optimistic Most Likely Pessimistic Precedes Activity Start - - A,B C,D A 44 45 50 60 D 42 45 EFF 0 A 14 56 75 48 49 39 31 27 40 36 70 End 58 82 What is the estimated expected (mean) time for activity E? What is the estimated expected (mean) time for activity E? Multiple Choice 35 days 36 days O 45 days O 40 days O C 39 days