A7-3 (Algo) The expected times and variances... The expected times and variances for the project activities follow. Complete the table showing which activities are critical. ID Description Predecessor Variance Critical? 1 Pilot production None 6 3 2 Select channels of distrib None 12 3 Develop mktg. program None 17 2 4 Test market 1 4 5 Patent 1 19 5 Full production 4 17 10 Ad promotion 8 Release 2,5.6,7 2 What is the probability of completing the project in 28 periods? Hint: Use the =NORM.S.DIST(z. TRUE) function In Excel to compute the probability. (Do not round Intermediate calculations. Round the final answer to 3 decimal places, L.e.. 0.750.) The probability of completing the project in 28 periods