Marginal tax rates Using the tax rate schedule given here perform the following: a. Find the marginal tax rate for the following levels of sole proprietorship earnings before taxes: $17,000; $58,600; $91,500; $155,000; $235,000, $446,800; and $1 million. 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 before taxes of $17,000 is %. (Round to the nearest integer.)