All five members of a project team add 20% to their individual serial activities as a safety margin

All five members of a project team add 20% to their individual serial activities as a safety margin and submit their time estimates to the project manager. The manager adds the activity length estimates together and adds 20% for his personal safety margin, then, anticipating a cut by top management, adds another 20% to his final project estimate. Much to his surprise, top management cuts only 10% off his time estimate. How much cushion is not built into the project?A. 62%B. 74%C. 56%D. 42%