$3.$ Rework Problem $2$ under the assumption that, in addition to your venture's taxable income of $$50,000,$ you expect to personally earn another $$10,000$ from a second job.

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A$.$ Calculate the amount of your income taxes if you were filing as a single individual.

B$.$ Calculate the amount of your income taxes if you were married and filing jointly

C$.$ If your venture had been organized as a standard corporation instead of a proprietorship, calculate your income tax liability.