please solve by handwriting

Question 12.08 On January 1 , a fund was opened with an initial deposit of 10,000. On July 1 , the balance was 10,800 , and then an additional 4,200 was deposited. The annual effective yield for this fund was 6.5% over the calendar year. Calculate the time-weighted rate of return for the year. A 7.3% B 7.5% C 7.7% D 7.9% E 8.1%