1. Al Barkley is single and earns $40,000 in taxable income. He uses the following tax rate schedule to calculate the taxes he owes. Up to $9,275 10% $9,275 $37,650 15% $37,650 $91,150 25% $91,150 $190,150 28% What is Al's average tax rate? a. 14.43% b. 18.27% c. 2 1.35% d. 23.87% e. 25.00%