Lee opened a tax-free savings account (self-directed TFSA account) in 2014. He contributed $4,500 to the account in that year. In January 2016, Lee withdrew $3,500. At the end of 2016, he contributed another $1,500 to his TFSA. What is Lees unused TFSA contribution room at the beginning of 2021 (include the year 2021 contribution)? Mr. Lee turned 18 in 2008. (Show your calculations)