1. Determine the tax liability, marginal tax rate, and average tax rate in each of the following cases. Use the form 1040EZ tax tables to determine tax liability. a. Single taxpayer, taxable income of $23,764 Liability= Marginal= Average= b. Single taxpayer, taxable income of $45,392 Liability= Marginal= Average= 2. Sheniqua, a single taxpayer, had taxable income of $74,053. Her employer withheld $14,290 in federal income tax from her paychecks throughout the year, Using the tax tables, would Sheniqua receive a refund or would she be required to pay additional tax? What is the amount?