Marginal corporate tax rates Using the corporate tax rate schedule given here LOADING..., perform the following: a. Find the marginal tax rate for the following levels of corporate earnings before taxes: $ 16 comma 800; $ 58 comma 300; $ 89 comma 900; $ 205 comma 000; $ 401 comma 000; $ 1.4 million; and $ 20.3 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.