Alex is a tax accountant at KPMG$.$ She loves her cat, Grim, so much that she decided to invest in Kitty LP $($an animal shelter partnership where they save and facilitate adoption for cats$).$ On January $1,2022,$ she took out a loan for $$100,000$ to purchase a building to be used for investment purposes. In $2022$ she also:

received $$85,000$ salary for her job as a tax staff.

received $$600$ flow$-$through income from his investment in Kitty LP$.$

paid $$6,000$ in interest expense related to the loan for the building.

a$)$ What is her investment income in $2022?$

b$)$ What is her potential investment interest expense in $2022?$