Convert the following base $2($binary$)$ numbers to base $16.$ The binary numbers are grouped in $4$ bits for easy read. Show your,steps.

$(11001101{)}_2$

$(101110111001{)}_2$

$(1\mathrm{.}000101011101010{)}_2$

$(10111110110110111010{)}_2$

$(101010001011100011101101{)}_2$