Please help in excel. It just makes it easier when the numbers change

Kelle Carpet and Trim installs carpet in commercial offices. Peter Kelle has been very concerned with the amount of time it took to complete several recent jobs. Some of his workers are very unreliable. A list of activities and their optimistic completion time, the most likely completion time, and the pessimistic completion time (all in days) for a new contract are given in the following table?

ne, the most likely completion time, and the pessimistic completion time (all in days) for a new contract are given in the following table: Activity a Time (days) m mmediate Predecessor(s) Activity a Time (days) m b Immediate Predecessor(s) A,E AOW1 PI- WACONIU LLO 15 Timo J K 13 5 17 13 B, D Y 9 HU 2 . C) For the given project, the earliest start (ES) and earliest finish (EF) are: (Round your responses to two decimal places.) Activity - IT mo ES 0.00 0.00 0.00 2.00 11.00 15.00 15.00 18.00 25.67 2.00 32.67 E F 5.00 11.00 2.00 10.00 15.00 18.00 25.67 30.00 32.67 17.00 41.67 For the given project, the latest start (LS) and latest finish (LF) are: (Round your responses to two decimal places.) Activity - I LSLF 32.67 41.67 26.67 41.67 25.67 32.67 20.67 32.67 15.00 25.679 17.67 20.67 11.00 15.00 3.00 11.00 1.00 3.00 0.00 11.00 10.00 15.00 m T 0 > d) Referring to the standard normal table, the probability that Kelle Carpet and Trim will finish the project in 45 days or less is (Enter as a probability and round your response to two decimal places.)