Use the figure below to answer the following questions. 
Figure 12.3.1
-Refer to Figure 12.3.1.The efficient quantity is
Definitions:
IRR
Internal Rate of Return (IRR) is the discount rate that makes the net present value (NPV) of all cash flows from a particular project equal to zero. It is used to evaluate the attractiveness of an investment or project.
Hard Capital Rationing
Hard capital rationing involves a situation where a company cannot access additional funds for investments at any cost due to external factors, such as market conditions or regulatory limits.
Discounted Payback
A capital budgeting method that calculates the time it takes to recoup an investment's initial costs, taking the time value of money into account.
Time Value of Money
The concept that money available at the present time is worth more than the same amount in the future due to its earning capacity.
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