Clear explanation please ..

Q2. In the image below it is shown the Project Cost - Duration Graph. (9 points) Describe in detail the three costs presented in the graph. Explain what are the Optimum cost-time point and Low-cost plan duration point. (3 points) Which point is considered when crashing the project? Explain why. (3 points) 60 Total costs 50 Optimum cost-time point 40 Costs 30 30 Low-cost plan duration point Direct costs 20 10 Indirect costs 6 8 14 10 12 Project duration 16 FIG 1. PROJECT COST-DURATION GRAPH