can someone answer all parts please

Dae-Sung has a mortgage for $972,814.00. The term of the mortgage is 4 years, and the amortization period is 15 years. Dae-Sung will make weekly payments and the mortgage rate is r(12) = 5.750%. a) How much are the weekly payments? $ b) What is the outstanding balance at the end of the term of the mortgage? $ c) How much does Dae-Sung still owe on the mortgage if he sells the house after 2 years? $