Marginal corporate tax rates

a. Find the marginal tax rate for the following levels of corporate earnings before taxes: $14,900; $61,000; $89,100; $196,000; $404,000; $1.6 million; and $19.7 million.

b. Plot the marginal tax rates (measured on the y axis) against the pretax income levels (measured on the x axis). Explain the relationship between these variables.

The total taxes due for earnings before taxes of $14,900 is $