In one month Sri Lankas floating-rate currency, the rupee (Rs), goes from 147 Rs/$ to 160 Rs/$, while the Japanese yen goes from 106 /$ to 100 /$. (a) There has been a devaluation of the rupee against the dollar and the yen. (b) The rupee has depreciated by 13.3% against the yen. (c) The rupee has depreciated by 15.4% against the yen. (d) The yen has been depreciated against the rupee and the dollar.