QUESTION 4 The activities, their durations and precedences for designing, writing and installing a Innovations computer database are shown in Table Q4. TableQ4 Innovations computer database activities i Activity Duration Activities that must be in weeks completed before it can start Contract negotiation Discussions with main users WIN un| N Review of current documentation Review of current systems 6 2 Systems analysis (a) 4 3. 4 Systems analysis (b) 7 5 Programming 12 5 Testing (prelim) 2 7 Existing system review report 1 - 3, 4 10 System proposal report 2 5, 9 Documentation preparation 19 5, 8 12 Implementation 7 7, 11 13 System test 3 12 14 Debugging 4 12 15 Manual preparation 5 11 7a) By use of network analysis determine is the earliest time that the operation might be completed? [15 MARKS] b) Which of the activities are on the critical path? [5 MARKS]