On January 15, 2000, enterprise A loans $6, 120.00 to Enterprise B and $16, 900.00 to Enterprise

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On January 15, 2000, enterprise A loans $6, 120.00 to Enterprise B and $16, 900.00 to Enterprise C. Enterprise B repays Enterprise A $7000 on January 15, 2002 and this money is reinvested at a 5% annual effective rate. Enterprise C repays Enterprise A $22500 on January 15, 2004.

What is the annual yield received by Enterprise B over the four-year interval?