Mona Lisa commissioned Leonardo to paint her portrait for $3,000. The day before Leonardo was to paint her portrait, he came down with a sickness. He contacted his good friend, Michelangelo, to paint the portrait. Michelangelo is a(n) O assignee O incidential beneficiary O delegator O delegatee O intended beneficiary O assignor

In the short-run, marginal costs are equal to the change in variable costs as output changes. ( mc = change in variable cost / change in quantity) assume that capital is fixed in the short-run. (a) start with the equation for marginal cost and derive an equation that relates marginal cost of production to the cost and productivity of labor. (b) draw a standard looking short-run marginal cost curve and use the equation you derived to explain its shape.