A machine stores floating point numbers in $7-$bit word. The first bit is used for the sign of the number, the next three for the biased exponent and the next three for the magnitude of the mantissa. The number $)0010110(2$ represented in base$-10$ is

Question $4$ options:

$0\mathrm{.}375$

$0\mathrm{.}875$

$1\mathrm{.}5$

$3\mathrm{.}5$