Pls help with a-c! Show work using Excel please! Will give like!

total project completion time (in days) and those activities that lie along the critical path. The appropriate data are shown in the following table: a) The expected completion time of the project = _ days (round your response to two decimal places). The activities that represent the project's critical path are c) The number of days that would result in 99% probability of completion is = days (round your response to two decimal places)