(a) The increase in the demand for corn shifts demand from D_c1 to D_c2. As a result, the quantity of corn increases from Q_c1 to Q_c2, and the price of corn increases from P_c1 to P_c2.(b) The increased demand for corn causes farmers to shift some of their production from wheat to corn. Consequently, the supply of wheat shifts in from S_w1 to S_w2. The quantity of wheat decreases from Q_w1 to Q_w2, and the price of wheat increases from P_w1 to P_w2. The resulting increase in the wheat price feeds back in turn to the corn market, shifting the supply of corn from S_c1 to S_c2, reducing the quantity of corn to Q_c3 and raising its price to P_c3, because of increases in the price of inputs into corn production.