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Assume a bronze sculpture sold in 2003 at auction for a price of $10,411,991. Unfortunately for the previous owner, he had purchased it in 1999 at a price of $12,477,997. Required: What was his annual rate of return on this sculpture?(Do not include the percent sign (\%). Enter rounded answer as directed, but do not use the rounded numbers in intermediate calculations. Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places (e.g., 32.16).)