Calculate the molality of $1\mathrm{.}5MMgC{l}_2$ solution. The density of the solution is $1\mathrm{.}127\frac{g}{m}L.($The molar mass of $MgC{l}_2=95\mathrm{.}211\frac{g}{m}ol$ and the molar mass of $H_{2}O$ is $18\mathrm{.}02\frac{g}{m}ol.)$

$1\mathrm{.}69m$

$1\mathrm{.}52m$

$2\mathrm{.}00m$

$1\mathrm{.}27m$

$1\mathrm{.}14m$