On 1/1/2000, $1,000 was deposited in fund X at an annual effective interest rate of i, and $500 was deposited in fund Y at a simple interest rate of i plus 2%. On 7/1/2000, $1,000 was deposited in fund Y. On 1/1/2001, $500 was deposited in fund X. On 1/1/2002, the total amount of both funds was $3,550. What was the annual effective rate pf interesti