Suppose that you have a $$20,000$ unsubsidized student loan that is currently deferred. You plan to complete the final $1\mathrm{.}5$ years of undergrad $($assume $18$ months until graduation$)$ and then complete a $2$ year master's program. Upon graduating from your master's program, the loan will enter repayment, and then you'll pay off the loan over $10$ years. The loan's interest rate is $7\%,$ compounded monthly. While the loan is deferred, you are not required to make any payments, but it is still accruing interest. So$,$ you consider making interest$-$only payments each month until you finish your master's program. Prepare monthly amortization tables for both scenarios. How much do you save when making these voluntary payments? Need it done in an excel file.