1 : A homebuyer has $25,000 to invest in a $240,000 home. Alternatively, she can obtain either a $215,000 single loan at 8.5% for 30 years or a combined loan of $190,000 loan at 8% for 30 years and a second mortgage of $50,000 at 12% for 30 years. What would be the monthly payment of the single loan, assuming monthly amortization?

.2. A borrower can obtain an 80% loan at 8.5% with monthly payments amortized over 30 years, or obtain a 90% loan at 9% with the same duration. What is the incremental borrowing cost assuming the loan is held for the full term?

help me solve both pls not one