Please help me find the answer to E.

The following table represents a plan for a project: TIMES (DAYS) PREDECESSOR JOB (5) 2 1 4 m 3 2 JOB NO. 1 2 3 4 5 6 7 8 9 10 11 1 1 2 3 4 5, 6 8 7 9, 10 3 1 1 1 2. 2 3 5 5 4 3 2 8 4 4 4 7 b 4 3 12 11 5 3 9 6 12 5 8 b. Indicate the critical path. 1-4-7-10-11 1-3-6-8-9-11 1-2-5-8-9-11 c. What is the expected completion time for the project? (Do not round intermediate calculations. Round your answer to 2 decimal places.) Answer is complete and correct. Expected completion time 26.83 days d. You can accomplish any one of the following at an additional cost of $1,500. If you will save $1,000 for each day that the earliest completion time is reduced, which of the following actions should be taken, if any? 1. Reduce job 5 by two days. Yes NO 2. Reduce job 3 by two days. Yes No 3. Reduce job 7 by two days. Yes No e. What is the probability that the project will take more than 30 days to complete? (Use Excel's NORMSDIST() function to find the correct probability for your computed Z-value. Other than the expected completion time you entered in part c above, do not round intermediate calculations. Round "z" value to 2 decimal places your final answer to 4 decimal places.) Answer is complete but not entirely correct. Probability 2.1730 X