Consider the path represented by the sequence of numbered edges on the graph below. Explain why the path is NOT an Euler circuit. 
Definitions:
Return On Investment
A financial metric used to evaluate the efficiency or profitability of an investment, calculated by dividing net profit by the cost of the investment.
Investment Opportunity
An investment avenue that has the potential to yield returns, involving the allocation of resources in expectation of future gains.
Minimum Required Rate
This is the lowest return that investors are willing to accept for investing in a project or security, often used in capital budgeting to assess potential investments.
Return On Investment
A measure used to evaluate the efficiency of an investment, calculated by dividing the net profit of the investment by its cost.
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