Compute the $2023$ tax liability and the marginal and average tax rates for the following taxpayers.

Click here to access the $2023$ tax rate schedule. If required, round the tax liability to the nearest dollar. When required, round the average rates to four decimal places before converting to a percentage $($i$.$e$.,\mathrm{.}67073$ would be rounded to $\mathrm{.}6707$ and entered as $67\mathrm{.}07\%).$

a$.$ Chandler, who files as a single taxpayer, has taxable income of $$170,200.$

Tax liability: $fill in the blank $1$

Marginal rate: fill in the blank $2$

$\%$

Average rate: fill in the blank $3$

$\%$

b$.$ Lazare, who files as a head of household, has taxable income of $$74,400.$

Tax liability: $fill in the blank $4$

Marginal rate: fill in the blank $5$

$\%$

Average rate: fill in the blank $6$

$\%$