a. You consider refinancing your current mortgage loan with a new 20 -year, 4.8% fixed rate mortgage loan. The refinancing cost is 3.0% of the loan amount. You paid up 120 months on the current 30 -year mortgage loan that had a fixed rate of 6.9% , and the initial loan amount was $280,000 . 

b. Consider a one-year ARM (i.e., 1/1), which has a 20-year term, offers an initial interest rate of 5.25% . It carries an interest cap of 2.75/2.0/6.5 , and a margin of 2.75% . 

(i) Calculate its interest rate next year given that the index rate is 6.75% . 

(ii) Calculate its interest rate in Year 3 when the index rate falls to 4.0% .

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Answer a Total monthly payment 166933 Total cost of ref... View the full answer