5 of 6 7 Pham, single, has wages of $208,000 and net investment income of $140,000 in 2021. Her AGI (MAGI) is $348,000. What is Pham's additional Medicare tax liability? What is Pham's net investment income tax? What if instead Pham has wages of $190,000, net investment income of $65,000, and modified AGI (MAGI) of $255,000 in 2021? 8 In 2021, Courtney, 16 and a dependent of her mother, had earned income of $4,000 and interest income (unearned) of $5,500. Courtney had no expenses associated with the production of her interest income. Courtney's mother is in the 35% marginal tax bracket. What is Courtney's taxable income? What is Courtney's net unearned income? What is Courtney's federal income tax liability (before credits)?