Mason $($single$)$ is a $50$ percent shareholder in Angels Corporation $($an S Corporation$).$ Mason receives a $$187,000$ salary working full time for Angels Corporation. Angels Corporation reported $$428,000$ of taxable business income for the year $(2023).$ Before considering his business income allocation from Angels and the self$-$employment tax deduction $($if any$),$ Mason's adjusted gross income is $$187,000($all salary from Angels Corporation$).$ Mason claims $$64,000$ in itemized deductions. Answer the following questions for Mason.

$1.$ What is Mason's self$-$employment tax liability?

$2.$Assuming the business income allocated to Mason is income from a specified service trade or business, what is Mason's deduction for qualified business income? Ignore the wage$-$based limitation when computing the deduction.

$3.$Assume the same facts as question $($b$),$ except that Angels Corporation reported $$178,000$ of taxable business income for the year. What is Mason's deduction for qualified business income? Ignore the wage$-$based limitation when computing the deduction.

$4.$Assuming the original facts, what is Mason's net investment income tax liability $($assume no investment expenses$)?$

$5.$ Assuming the original facts, what is Mason's additional Medicare tax liability?