$4.$ Hak Young has accumulated some credit card debt while he was in college. His total debt is now $$23,878\mathrm{.}00$ and his credit card charges $18\%$ interest compounded monthly. He is getting worried about his debt and is determined to pay it off completely.

What would Hak Young's minimum monthly payment have to be in order to pay off his debt in $5$ years? $[$Blank$-1]$

What will be the total interest paid? $[$Blank$-2]$