Suppose that you hire workers to address and stamp envelopes. Each worker earns $5 per hour and produces 50 addressed, stamped envelopes per hour. You have unlimited free office space and can therefore add as many workers as you want to with no fall-off in productivity. You have no expenses other than paying workers. Draw the total product, marginal product, average product, total cost, average cost, average variable cost, and marginal cost curves.