Use the following to answer questions
Figure: Understanding Surplus and Efficiency 
-(Figure: Understanding Surplus and Efficiency) In the graph,what is the efficient level of output?
Definitions:
Risk Free Rate
The rate of return on an investment with no risk of financial loss, typically represented by the yield on government bonds.
Market Premium
The additional return an investor expects to receive from a market portfolio compared to the risk-free rate.
Equity Investments
Financial investments in shares of companies, giving the holder ownership interest in the company.
Required Rate
The minimum annual percentage return that an investor expects to earn when investing in a particular security or project, factoring in risk.
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