In the spring of $2022,$ you and your family were looking for the house of your dreams. Given your household income and your expenses, you determined that you could afford to pay $$1,625$ for a monthly house payment. As of April $2022,$ it looked like you conld get a $30-$year mortgage rate of $3\mathrm{.}6\%.$

a$)$ Given the above information, what is the maximum amount you could finance for your dream home as of spring $2022?$

b$)$ You got busy and didn't find the right home and now it is summer $2024$ and you are looking at homes again. The good news is that there are more homes available for sale, but the bad news is that mortgage rates have gone up because of inflation. Assuming that you can get a rate of $7\mathrm{.}20\%$ APR for a $30-$year mortgage and further assuming that you can still afford to pay $$1,625$ per month, what is the highest amount you can now finance on a home?