a. How will the additional supply of fish from another vendor affect the marginal costs and average total costs of production and profit-maximizing output level. Illustrate it graphically or numerically. Briefly explain your answer.

b. Will the modernization of the fish market (i.e., processes, replacement of fish porters, etc.) affect the market supply, equilibrium price and equilibrium quantity demanded of fish in the market? Briefly explain and illustrate it graphically.