please answer all components of the one problem posted

The following represents a project that should be scheduled using CPM: IMMEDIATE PREDECESSORS ACTIVITY A B C D E F G H B CO DE F G TIMES (DAYS) a 1 4 7 1 3 5 2 5 11 1 8 9 1 2 3 1 6 11 1 2 3 2 3 3 b. What is the critical path? O A-C-F-H OB-E-G-H O A-D-G-H O A-D-F-H c. What is the expected project completion time? (Do not round intermediate calculations. Round your answer to 3 decimal places.) Project completion time days d. What is the probability of completing this project within 22 days? (Use Excel's NORM.S.DISTO function to find the correct probability for your computed Z.value. Do not round intermediate calculations, Round "x" value to 2 decimal places and final answer to 4 decimal places.) Probability