Need help to on the last question

please help on the last question

5 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. 2.5 oints ID 1 Description Plot production Select channels of Answer is complete and correct. Predecessor te Variance Critical? None 3 No None 40 4 Yes None 18 2 No 1 2 No 2 3 4 1 4 OOOOOOOO 5 1 15 5 Develop mito, program Test market Patent Full production Ad promotion Release No 4 16 10 6 7 8 2 3 2.5.0.7 50 No No Yes 2 1 What is the probability of completing the project in 29 periods? Hint: Use the ENORM.S.DISTIZ. 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.) Answer is complete but not entirely correct. The probability of completing the project in 20 periods 0.401 %