Below are the optimistic (a), most likely (m) and pessimistic (b) times (in days) for the activities on the critical path for a large project.

TASK	a	m	b
A	5	16	18
B	6	18	21
C	6	9	14
D	9	12	23
E	11	28	38

Copy data into Excel.

(a) Find the project (critical path) expected time and standard deviation.

(b) Find the probability of the project (critical path) being completed in 75 days.

(c) How many days should be allocated to by 90% certain the project will be completed?

Complete all of your work in an Excel file and clearly type your answers to questions (a), (b), and (c). Upload the file here. HINT: to simplify the problem, only the critical activities are listed here so you do not have to draw the network or identify the critical path