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We have four mutually exclusive investment projects to choose from: Time (years) Alfa Beta Gama Delta CF CF CF CF 0 -1000 -1000 -1000 -1000 1 300 250 0 150 2 700 350 0 200 3 200 400 450 300 4 -300 550 550 360 5 -300 470 1250 1200 Assuming that the interest rate (required rate of return on investment) is 10% on the basis of PP, DPP, NPV, IRR, PI - please choose the most favourable project - necessarily with a commentary of your choice (individual indicators). Please try to calculate also (both) rates of return for these projects.