A mortgage broker is offering a $$191,90020-$year mortgage with a teaser rate. In the first two years of the mortgage, the borrower makes monthly payments on only a $4\mathrm{.}8$ percent APR interest rate. After the second year, the mortgage interest rate charged increases to $7\mathrm{.}8$ percent APR.

What are the monthly payments in the first two years?

What are the monthly payments after the second year?

Note: Do not round intermediate calculations and round your final answers to $2$ decimal places.