Please explain values obtain where nescessary. Thank you!

Tutorial 1 - WBS, Gantt Chart and Network Diagram 1. Develop a work breakdown structure (WBS) for the purchase of a CNG powered vehicle with a minimum of three (3) level 1 activities, six (6) level 2 activities and ten (10) level 3 activities. 2. Using the data in the table below answer the questions which follow: Activities Duration (weeks) Predecessors A 5 B 15 25 B D 15 B E 30 B F 10 CD G 10 EF H 5 G 5 H a) Construct a Gantt chart b) Construct a network diagram c) Determine the overall duration of the project d) What are the activities along the critical path of the project e) Determine the slack time for all non-critical activities 3. Using the data in the table below answer the questions which follow. Activity Predecessors Planned Duration (weeks) A 2 B 1 A N D A 3 E 2 TI B, C 2 G D 4 H DE 2. 1 F 2 GH 4 a) Construct a Gantt chart b) Construct a network diagram c) Determine the overall duration of the project d) What are the activities along the critical path of the project e) Determine the slack time for all non-critical activities