Convert the following number systems and show the complete solution:

$1.$BIN$0101011\mathrm{.}111101101$ to octal

$2.$HEX$89$CD$56\mathrm{.}16$A to decimal

$3.$DEC$986372\mathrm{.}12$ to binary

$4.$OCT$6635\mathrm{.}31$ to hex

$5.$DEC$11\mathrm{.}11$ to octal

Please show drawn solutions