d) Assuming that the probability distribution of the length of the critical path can be approximated by a normal distribution with the mean and standard deviation calculated in part (b), calculate the probability that the project can be completed within 79 weeks. [4 points] e) What is the probability that the project will be completed between 78 and 82 weeks? [4 points] f) Answer the project manager's question: "I want to tell the client that there is a 19.77% chance that the project will take longer than X weeks to be completed - what figure should I give them (i.e. find X)?" [4 points]