If a firm moves from one point on a strictly convex production isoquant to another point on the same isoquant, which of the following statement(s) is/are false? 1. The same level of output II. A constant rate of technical substitution (TRS) Ill. A change in the marginal rate of substitution (MRS) IV. A change in the marginal products of the inputs O only I is false O II and Ill are false O I, II and Ill are false O I and IV are false