Question 21 3 pts At the end of 2018, a country's national debt was $13.6 trillion, In 2019, the government collected $5.3 trillion of tax revenues and spent $5.6 trillion. How much was the national debt at the end of that year, in trillions? Express your answer to 1 decimal place and without the $ sign or the word trillion. Example: if your answer is $10.2 trillion, enter 10.2 MacBook Air DOO