4. A three-month report for a warehouse, specialized in avocado, is presented below. As a manager, you are interested in finding the monthly productivity and productivity growth to decide employee numbers in your analysis. Month Month 1 Month 3 2 Units Avocado Case Sales 2,500 2,800 2,920 Employees 52 55 54 $ Sales $62,500 $70,560 $71,540 Cost of Sales $37,500 $39,200 $39,200 $40,880 a) Find the labor productivity and growth rate. b) Find the total productivity and its growth rate. c) Interpret the measures and explain your analysis result