What is X, the return of a stock 2 years ago, if the stock had returns of -20.00% (4 years ago), 20.00% (3 years ago), X (2 years ago), and 3.71% (last year), and over the past four years, the arithmetic average annual return for the stock was 5.25%?(Round the value to 100th decimal and Please enter the value only without converting it to a decimal format. If the answer is 8.55%, enter 8.55)

What was the arithmetic average return for a stock that had the following annual returns over the past 4 years: 10.00% (4 years ago), 20.00% (3 years ago), -17.00% (2 years ago), and -36.00% (last year)?(Round the value to 100th decimal and Please enter the value only without converting it to a decimal format. If the answer is 8.55%, enter 8.55)