Its a 3 part question

With activities (A through G ) and their expected times (in days) given by the nodes/circles in the following project diagram, the critical path for this project is: None of the above ACDGAEFGABGEFG What is the expected completion time for the project in Question 15? 10 days 28 days 12 days 15 days 9 days What is the expected completion time for the project in Question 15? 10 days 28 days 12 days 15 days 9 days