4. Activity Description Time (Hours) Preceding Activity A Write Use Case 4 B Develop GUI 16 Database 3 A D Design Tests A F Business Rules 2 B,C F Cross Check GUI with9 B,C DB G HTML Pages DE H SQL Codes 15 D,E Test 3 H J Php Code 13 F,G Above is the table to an activity graph for a sub-project. Conduct the following: - a. Draw the activity graph b. Come out with a table showing the activities' earliest start time, latest start time and slack time c. Identify the critical path. 5. A new use case to be developed has the following activities/tasks. Activity Description Time Preceding Activity Hours) A Write JS Case