Must use calculus

You buy a house for $190000, and take out a 30 -year mortgage at 6.5% interest. For simplicity, assume that interest compounds continuously. A) What will be your annual mortgage payment? $ per year B) Suppose that regular raises at your job allow you to increase your annual payment by 3% each year. For simplicity, assume this is a nominal rate, and your payment amount increases continuously. How long will it take to pay off the mortgage? years