Jane took a loan of $30,000,$ which is amortized with level semi$-$annual payments over

$10$ years at nominal annual interest rate of $8\%$ converted monthly.

a$)$ How much is each payment?

b$)$ Jane just made $7$th payment. What is the outstanding balance?

c$)$ Out of the $7$th payment, how much of it was used pay off the principle?