Government G levies an income tax with the following rate structure: Percentage Rate Required: 6% 10 20 28 Bracket Income from -0- to $30,000 Income from $30,001 to $70,000 Income from $70,001 to $200,000 Income in excess of $200,000 a. Taxpayer A's taxable income is $159,700. Compute A's income tax liability and average tax rate. What is A's marginal tax rate b. Taxpayer B's taxable income is $511,200. Compute B's income tax liability and average tax rate. What is B's marginal tax rate