21. Apply what have your learned in Gantt Chart and provide answers for the below: Assume the following: Task C, Duration 3, Predecessor: A, EST: 6 ,EFT: 9, LST: 10, LFT: 13. Task D, Duration 2, Predecessor: C,B, EST: 10 ,EFT: 12, LST: 13, LFT: 15. Task E, Duration 5, Predecessor: B, EST: 10 ,EFT: 15, LST: 10, LFT: 15. Knowing that the project ends at the tasks D and E. What is the project completion time? In your Gantt Chart, what are the values of the beginning and the ending at the bar of task D? (More than one answer will mark the part of the question by zero) ( (3 Points) Enter your