Can you break down this problem step by step. I cant figure out how this answer is calculated.

Marc, a single taxpayer, earns $$61,200$ in taxable income and $$5,120$ in interest from an investment in city of Birmingham bonds. Using the U$.$S$.$ tax rate schedule for $2023,$ what is his average tax rate? $($Use tax rate schedule.$)$

Note: Round your final answer to two decimal places.

Multiple Choice

$14\mathrm{.}33$ percent

$11\mathrm{.}65$ percent

$11\mathrm{.}42$ percent

$22\mathrm{.}00$ percent