Can I get help on answering this question all the way please?

Estimates of the optimistic, most probable, and pessimistic times (in weeks) for the activities are as follows. (a) Find the critical path. (Enter your answers as a comma-separated list.) (b) What is the expected project completion time (in weeks)? e) What should the construction company tell the owner? (Enter your free-form answer using as many characters as necessary.)