Angela opened a tax-free savings account (self-directed TFSA account) in 2015. She contributed $4,500 to the account in that year. In January 2016, Angela withdrew $2,500. At the end of 2016, she contributed another $3,500 to her TFSA. What is Angelas unused TFSA contribution room at the beginning of 2020? Angela turned 18 in 2014. (Show your calculations)