13. Ialculate the ES, BF: LS, and'Lthimes and the slack for each activity in the gure below, and identify the critical path for the project. Can the project he completed in 40 weeks? Assume that activity A actually nished at 3 weeks, activity B actually nished at 12 weeks, and activity C actually finished at 13 weeks. Recalculate the expected project completion time. Which activities would you focus on to get the project back on schedule