I have to complete exercise 13.1, 13.3, & 13.11

For Exercise 13.1, with the given diagram shown, with activities A through g and duration time:

a. Identify the paths and path duration times.

b. Determine the critical path.

For Exercise 13.3, calculate ES, LS, EF, LF, and slack time for the activities in Exercise 13.1.

For Exercise 13.11,  a hospital is planning to add a $60 million patient tower.  In order to support both the exisiting hospital facility and the new patient tower, an existing energy plant will be expanded and upgraded.  Equipment upgrades include a new generator, liquid oxygen tanks, cooling towers, boilers, and a chiller system to ensure adequate electricity, heating, air conditioning, hot water, and oxygen delivery systems.  Existing fuel tanks will be relocated.  The activities, their immediate predecessors, and the optimistic, most likely, and pessimistic times in weeks for this project are listed in Table EX 13.11:

a. Calculate the mean duration time for each activity.

b. Calculate the variance for each activity time.

c.  Identify the mean and the standard deviation for each path.

d. Calculate project completion probability for 147, 150, and 152 weeks.

The CPM Determinisitic excel spreadsheet for 13.3 & PERT Probabilistic excel spreadsheet for 13.11 were two additional excel spreadsheets that were attached to the homework assignment.  The instructions stated to use these Excel automated templates for my calculations. I am suppose to transfer information from them to the Excel file that I am submitting.  

Thank you in advance to whoever assists me with my homework exercise assignments.  Let me know how much it will cost for your assistance.