Your best friend invests $2,200 into a certificate of deposit that is expected to earn an annual rate of return of 7%. After 15 years, how much is the simple interest and interest on interest she earned? Simple interest: $1,559.9 & Interest on Interest: $3,869.9 Simple interest: $2,310.0 & Interest on Interest: $1,559.9 Simple interest: $6,069.9 & Interest on Interest: $1,559.9 Simple interest: $2,310.0 & Interest on Interest: $3,759.9