Which of the graphs below have Euler circuits? 
Definitions:
Compounded Monthly
This is the process of calculating interest on both the initial principal and the accumulated interest from previous periods on a monthly basis.
Mutual Fund
An investment vehicle that pools money from multiple investors to purchase a diversified portfolio of stocks, bonds, or other securities.
Compounded Monthly
Interest calculation method where the interest is added to the principal balance monthly, leading to compound growth.
Compounded Monthly
Interest on an investment or loan is calculated and compounded every month.
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