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Question 4 Based on the network logic diagram (AOA Activity On Arrow format) in Figure 1 (time in a day), D E 00 4 5 B 3 Figure 1 - Network logic diagram (AOA) (a) Calculate the ES, EF, LS, LF, and the slack as tabulated in Table 2. (10 marks, C3) (b) Using the network in Figure 1 above and the additional information in Table 3 below 1. Calculate the crash cost slope per day. (5 marks, C3) ii. Which activities should be crashed to meet the project deadline of 14 days at a minimum cost? (3 marks, C3) iii. Calculate the new cost of the project. (2 marks, C3) Table 2. ES, EF, LS, LF, and Slack Activity ES EF LS LF Slack A B D E (Student are required to copy Table 2 in the answer booklet)