11) Alar and Shiva bought a house and took out a mortgage for $400,000 and can get an interest rate of 5% compounded semi-annually. Alar wants to pay it off making the standard monthly payments over 25 years, BUT Shiva says they can save a lot of money interest) by making larger payments of $2,500 per month AND it fits in their budget! Determine: a. The size of the payments if they pay off the loan over 25 years. b. The number of payments required if the pay it off with $2,500 payments. c. The size of the last payment if they make the $2,500 payments. d. The interest saved by making the $2,500 payments (suggested by Shiva) vs. paying it Alar's way over the 25 years with equal payments