Two moving coil galvanometers, X and Y have coils with resistances $10\Omega$  and  $14\Omega$ , cross –sectional  area  $4.8\times {10}^{-3}{m}^2$ and  $2.4\times {10}^{-3}{m}^2$ , number of turns 30 and 45 respectively. They are placed in magnetic fields of 0.25T and 0.50 T respectively. Then the ratio of their current sensitivities and the ratio of their voltage sensitivities are respectively .