A firm's financial data for the past two years follow Last Year $200,000 30,000 35,000 5,000 50,000 2,000 This Year $220,000 40,000 45,000 6,000 50,000 3,000 Output Input Sales Labor Raw materials Energy Capital Other (a) Calculate the single-factor productivity of energy and labor for the past two years (b) Calculate the multi-factor productivity of labor, capital and raw material for the past two years (c) Calculate the total-factor productivity for the past two years