suppose that IBM would like to borrow fixed-rate yen, whereas Korea Development Bank (KDB) would like to borrow floating-rate dollars. IBM can borrow fixed-rate yen at 4.5% or floating-rate dollars at LIBOR + 0.25%. KDB can borrow fixed-rate yen at 4.9% or floating-rate dollars at LIBOR + 0.8%. A- what is the range of possible cost savings that IBM can realize through an interest rate/currency swap with KDB? B- assuming a national principal equivalent to $ 125 million and a current exchange rate of