A cell-phone repair shop consists of three processes. Step 1 requires 6 minutes per unit, step 2 requires 5 minutes per unit and step 3 requires 7 minutes per unit. 30% of units that complete the third step require rework, which means those units must start the process over at step 2 (processing times are the same for units being reworked) and rework is always successful. Demand at the shop is 0.5 units per minute Instruction: Round your answer to three decimal places What is the capacity of the shop in units per units per minute)?