On January 1, Ezequiel opens an account at Friendly Bank. His opening deposit is for $50 and he makes deposits at the end of each quarter for four years, then makes no more deposits. He closes the account exactly seven years after he opens it and receives $3,813.29. Find his annual yield rate for this seven-year period if his quarterly deposits were $70 in the first year, $75 in the second year, $60 in the third year, and were successively $500, $450, $900, and $250 in the fourth year. (Round your answer to two decimal places.)