please solve by handwriting

Question 12.09 You are given the following information about an investment fund: On January 1 , the value of the fund is 16. On July 1 , prior to any deposits being made, the value of the fund is 20 . On July 1 , a deposit of D is made. On December 31 , the value of the fund is D. For the year, the time-weighted return on the fund is 0%, and the dollar-weighted rate of return (using the simple interest approximation) is R. Calculate R. A 29% B 15% C 0% D 15% E 29%