Help me solving this question.

Your retired client has accumulated investment and retirement assets totaling $7,890,000. Assume the client expects to live for another 23 years and that he assumes an annual inflation rate of 4.0 percent. To leave his heirs the future value of the $7,890,000 at the end of the 23 years, and maintain an inflation-adjusted lifestyle of $275,000 a year for all 23 years, the clients investments would have to earn an average of ______ percent a year for the entire 23 years.

Round the answer to two decimal places in percentage form. Please write your answer in "Your Answer" box.

Correct Answer: 7.62%

Write the % sign in the Units box.