Madina owns a traditional herbal medicine company called Naturalherbs. She sells vitamins and other relatively nonperishable products for those who want choices regarding alternative medicine. Madina is developing a new system that would require her staff to be retrained. Given the information in the table below the list of activities along with their required time for completion Predecessors None None 2 Activity Interview executive Interview staff in order fulfillment Design input prototype Design output prototype Write use cases Records staff reactions to prototype Develop system Write up training manual Train staff working in order fulfilment Task 1 2 3 4 5 6 7 8 9 1,3 Time (Weeks) 6 3 2 3 4 2 5 3 2 13 4 5,6 2,7 8 Required: (a) Prepare a network diagram for Madina new system, (8 marks) (b) Determine the earliest expected completion time. Determine the critical path for Madina new system (3 marks) (4 marks) (c) 1 Madina want to find a way to save time on the write use cases" phase, would it help? Justify your