Abby provides you with the following tax info:

Abby's Salary from Angel City Corp $$180,000$

Abby's Share of Angel City Corp $($S Corp$)$ Income $$200,000$

Aby's AGI $($before S Corp Income or SE tax$)$ $$180,000$

Abby's Itemized Deductions $$50,000$

$($a$)$ What is Abby's self$-$employment tax liability?

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

$($c$)$ What is Abby's net investment income tax liability $($assume no investment expense$)?$

$($d$)$ What is Abby's additional Medicare tax liability?