Suppose that you take a $30-$year, monthly payment, $3/1$ interest$-$only ARM for $$325,000$ with an initial contract rate of $5\mathrm{.}25\%$ and a contract rate in year $4$ of $6\mathrm{.}75\%.$ What are your monthly payments for the interest$-$only period and then for year $4?$ USING FINANCIAL CALCULATOR KEYSTROKES