Joe's Bar and Grill hires six workers to prepare the meals in the kitchen for his restaurant. They are able to prepare on average 89 meals per day. If it hires another worker for the kitchen, the number of meals prepared increases to 94. As his business grows, he hires the eighth worker and the number of meals prepared decreases to 91 meals per day. How can you explain this in terms of productivity? How does the marginal physical product of his last worker affect Joe's decisions? What could Joe do to make it feasible to hire the eighth worker at his business