4. Which statement is true? (LO1) a) Resources and final products are both measured by units of input. b) Resources and final products are both measured by units of output. c) Resources are measured by units of input, and final demand is measured by units of output. d) Resources are measured by units of output, and final products are measured by units of input. 5. Which statement is true? (LO2) a) Productivity is output per unit of input. b) Productivity is input per unit of output. c) Productivity is neither of the above