A foreign exchange arbitrageur notices that the Japanese yen to U.S. dollar spot exchange rate is 108/$ and the three-month forward exchange rate is 107.30/$. The three-month $ interest rate is 5.20 percent per annum and the three-month interest rate is 1.20 percent per annum.

a) Is the interest rate parity holding? which is currency is undervalud and what is amount of mispricing?