please explain in detail

Question 2 Questions based on Chapter 13 of METS-3 (Principles of Project management A project consists of 8 activities. The duration in days of each item is as follows: A = 5, B = 15, C = 25, D = 15, E =30, F = 10. G = 10, H = 5,1 = 5; A is the first item that must be completed. B is preceded by A. C, D and E is preceded by B. F is preceded by C and D F is preceded by D and E. G is preceded by E and F. His preceded by G ISB) I is preceded by H 2.1 Construct a project network diagram (activity on node diagram)