4 Assume that at the beginning of the year, you purchase an investment for $7.200 that pays $105 annual income. Also assume the investment's value has increased to $7,950 by the end of the year. (a) What is the rate of return for this investment? (Input the amount as a positive value. Enter your answer as a percent rounded to 2 decimal places. ts 1- 1%) Rate of return eBook Print ferences (b) Is the rate of return a positive or negative number? C Positive Negative