What was the arithmetic average return for a stock that had the following annual returns over the past 4 years: 16.00% (4 years ago), 13.00% (3 years ago), -18.00% (2 years ago), and -37.00% (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)

What is X, the return of a stock 2 years ago, if the stock had returns of -12.00% (4 years ago), 19.00% (3 years ago), X (2 years ago), and 3.97% (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)