A manager checked production records and found that a worker produced 156 units while working 40 hours. In the previous week, the same worker produced 105 units while working 30 hours. a. Compute Current period productivity and Previous period productivity. (Round your answers to 2 decimal places.) Current period productivity Units / hr Previous period productivity Units / hr b. Did the worker's productivity increase, decrease, or remain the same? (Round your intermediate calculations and final answer to 2 decimal places. Omit the "%" sign in your response.) Worker's productivity by %