Suppose that in an economy 100 hours of labor work produce 160 units of output in year 1. In year 2, the hours of labor work are 120 and the units of output are 216. In year 3, the hours of labor work are 130 and the units of output are 260. Calculate the productivity for all the three years. (6 marks) Using year 1 as the base year, calculate the productivity index for year 2 and year 3. (4 marks)