Marginal tax rates Using the tax rate schedule given here $[$i$],$ perform the following:

a$.$ Find the marginal tax rate for the following levels of sole proprietorship earnings before taxes: $$15,600$;$$61,600$; $$92,000$;$$153,000$;$$231,000$; $$448,800$; 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 $$15,600$ is

$\%.($Round to the nearest integer.$)$

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Tax Rates Schedule