Can you please help me understand how to solve these practice problems for Operations Management. The questions are very difficult

1. Consider the following data for a project - Activity Immediate Activity Time Predecessor(S) (days) '-_IC)TImUOUJI> whmwooamcnn-m Draw the network diagram Calculate the critical path for this project How much slack is in activities G, H, and I? 2. The following information is known about a project Activity Immediate Activity Time Predecessor(S) (days) A A B,C D E E Draw the network diagram for this project Determine the critical path and project duration Calculate the slack for each activity