Mr. Brightside Company’s income before taxes for financial reporting for 2017, 2018, and 2019 is $100, $100, and $100. Brightside also recorded an asset for prepaid rent of $90 on its balance sheet in 2017. The rent is to be used evenly over the next two years. The tax rate in 2017 is 30%, in 2018 is 30%, and in 2019 is 20%.

1. What is income tax expense for 2017?

2. What is income tax expense for 2018?
3. What is income tax expense for 2019?