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The only variable input is labor while the amount of capital used is fixed and its cost shown in table as fixed cost Variable cost only comes from labor with cost per unit shown in table All output can be sold at prices shown in table Labor Input outpuMarginal Physcal bxed Variable Total Avg Fbxed Avg vaableTotal Marginal Cost Price Total Revenue Margiral Prof t Unt cost-$15Product (MPP) of Labor CosCost Cost CostCtMC) Revenue 60 21 20 410 13 6 15 17 15 15 16 8 17 13 4. What is the value of the marginal physical product when labor input increases from 2 to 3? a. b. 2 d. 4