Use the following to answer question: 
-(Table: Total Product and Marginal Product) Use Table: Total Product and Marginal Product.Negative marginal returns begin when the _____ worker is added.
Definitions:
Short-run Industry
A period in economic analysis where at least one input is fixed, limiting the industry's ability to adjust to changes in market conditions.
Game-day T-shirts
Apparel specifically designed and marketed for fans to wear on the day of a sports event.
Short-run Supply Curve
A graphical representation showing the quantity of goods a firm is willing and able to supply at different prices in the short run, considering some inputs are fixed.
Cost Curves
Graphical representations used in economics to show the costs of producing a certain number of goods, underlining concepts like marginal cost and average cost.
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