Consider the 7 activities of a project, whose precedences, execution time and costs appear in the following table:

a) Determine the critical path(s) and the execution time of the project. b) Calculate the cost slopes of each project activity. c) How much will it cost to advance the execution time of the work by 3 days? d) Make the graph TIME - COST.

Activity A B D E F G LL Preceded by A,B B D,E B,C Normal time (days) 10 12 13 14 13 01 5 10 Normal Cost ($ Accelerated time (days) per day) 2000 8 1500 10 700 11 5600 13 1600 10 2500 4 1000 8 Accelerated cost ($ per day) 2400 1800 850 5650 2200 2600 1050