Judge Macy has reviewed a contract between Martin and Rowan and has determined that the written terms of the contract represent the final agreement between the two parties. According to Judge Macy, their contract is:

Plastic and steel are substitutes in the production of body panels for certain automobiles. if the price of plastic increases, with other things remaining the same, we would expect: a) the demand curve for plastic to shift to the left. b) the price of steel to fall. c) the demand curve for steel to shift to the left d) nothing to happen to steel because it is only a substitute for plastic. e) the demand curve for steel to shift to the right