A$.$ Work out directly in base $2$ and do the binary operations:

$1)10111\mathrm{.}101+111101\mathrm{.}110+11101\mathrm{.}010$

$2)10001001-110111$

$3)1011$ X $101111$

B$.$ Convert the following Base $10$ numbers to their Binary equivalent and solve the given items:$$

$4)45-34($using $1\text{'}$s Complement$)$

$2)67-95($using $2\text{'}$s Complement$)$

$3)-43-27($using Normal Subtraction$)$