Consider the cash flows from the three activities (farming, forestry and mining) Farming Forestry Mining 50 50 50 50 Year 1 231 4 5 ... 10 11 12 thereafter 25 25 25 25 25 25 25 25 25 25 0 0 0 0 0 0 0 60 60 Treat the three income streams (from year 1 onwards) as if they were bonds. Find the prices of the three bonds in each of the following cases: (i) all the bonds yield 5%, (ii) all yield 10%, (iii) all yield 15%. Which is the most expensive bond in each of these cases, and which is the cheapest? Explain your answers.