can u answer fast please cuz i need to submit it after 2 hours.

(a) Based on the information in Table 1, what is the expected length to finish the project? Draw a complete of the precedence diagram. [10 marks) Table 1: Assembly project 1 2 3 4 5 6 7 Activity Time (hours) Immediate predecessors 6 7.2 5 6 4.5 7.7 4 1 2,3 3,4 4 5,6 (b) Calculate each path's total activity time based on Table 1. [6 marks] (C) Draw a complete Gantt chart for the project. [9 marks]