Using the points on the following diagram,identify which combinations of these points illustrate diminishing returns to capital.Give a brief explanation to support your answer. 
Definitions:
Equilibrium Price
The price at which the quantity of a product offered is equal to the quantity of the product demanded, leading to a balance in the market.
Demand Curve
A graphical representation of the relationship between the price of a good and the quantity demanded by consumers at various price levels.
Legal Interest Rates
The maximum rate of interest lenders can charge borrowers, as determined by law.
Rent Controls
Government-imposed laws that limit the amount landlords can charge for renting out their properties, aimed at making housing more affordable for renters.
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