2) Alar and Shiva bought a house and took out a mortgage for $520,000 and can get an interest rate of 7% 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 $4,000 per month AND it fits in their budget! Determine: (8) 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 $4,000 payments. c. The size of the last payment if they make the $4,000 payments. d. The interest saved by making the $4,000 payments (suggested by Shiva) vs. paying it Alar's way over the 25 years with equal payments