Using the points on the diagram below,identify which combinations of these points illustrate diminishing returns to capital.Give a brief explanation to support your answer. 
Definitions:
Commute by Car
The act of traveling between one's home and workplace or school by automobile.
Confidence Interval
A range of values, derived from statistical analysis, that is likely to contain the true value of an unknown parameter with a certain level of confidence.
Incentive Program
A plan or approach aimed at promoting certain behaviors or activities by providing incentives or advantages.
Sick Leave
Paid or unpaid time off work provided by employers for employees who cannot work due to illness.
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