The interest rate on a $$100000$ loan is $7\mathrm{.}2\%$ compounded semiannually. The monthly payments on the loan are $$700.($Do not round intermediate calculations. Round the PMT and final answers to $2$ decimal places.$)$

a$.$ Calculate the interest component of Payment $221$

b$.$ Calculate the principal component of Payment $156$

c$.$ Calculate the final payment