please help. will thumb up. thank you

On March 1, 1993, Mr. Hernandez deposited $4,200 into an account that used a 4% annual effective interest rate when the balance was under $5,000 and a 6.5% annual effective interest rate when the balance is at least $5,000. Mr. Hernandez withdrew $1,000 on March 1, 1999. If there were no other deposits or withdrawals, find Mr. Hernandez's account balance on March 1, 2003. (Round your answer to the nearest cent.) $