Marginal tax rates Using the tax rate schedule given here (i). pertorm the following: a. Find the marginal tax rate for the following levels of sole proprietorship earnings before taxes: $16,600;$59,000;$90,400;5160,000; 5230,000 ; 3441,900 , and $1 milian b. Plot the marginal tax rates (measured on the y-axis) against the pretax income levels (measured on the x-axis) a. The marginal tax rate for earnings betore taxes of $16.600 is 16. (Round to the nearest integof.)