Consider the following income tax schedule that shows the percentage of tax that would be applied on specific annual income ranges: Income Range Tax Rate $0 to $9,075 10% $9,076 to $36,000 15% $36,901 to $89,350 25% $89,351 to $186,350 28% $186,351 to $405,100 33% $405,101 to $406,750 35% $406,751 and above 39.6% Suppose a person’s labor income is $30,000 per year. The person also needs to pay a 15% tax as federal taxes that will go towards the person’s retirement funds later. Compute the person’s marginal and average tax rates? What happens to marginal and average tax rates when income increases to $60,000 per year