Peter Piper has applied for a mortgage of $$140,000.$ Interest is computed at $7\mathrm{.}5$ percent compounded semiannually. The mortg vill be paid off over $20$ years. $($For all requirements, use a Financial calculator to arrive at the answers. Do not round intern calculations and Round the final answers to $2$ decimal places.$)$

a$.$ Calculate Peter's monthly payment.

Monthly payment

b$.$ Calculate Peter's weekly payment.

Weekly payment

c$.$ Calculate Peter's biweekly $($every $2$nd week$)$ payment.

Biweekly payment