Represent the following hextets $(16-$bit binary numbers$)$ using $4$ hexadecimal digits:

$1111\mathrm{.}1011\mathrm{.}1110\mathrm{.}1101$

Convert the following compressed IPv$6$ addresses to the preferred format:

FE$80$:E$00$:$0$:F$5$BC:AA::$1$

Convert the following IPv$6$ addresses to the most compressed format possible:

$2001$:$0$DB$8$:$00$F$0$:$0000$:$04$EC:$0000$:$0000$:$00$A$0$

Creating the $64-$bit Interface ID portion of an IPv$6$ address using the EUI$-64$ process based on the following MAC addresses:

AF$56$:A$4$DB:$0$CE$9$

Specify the subnet ID of the following IPv$6$ addresses:

$2001$:DB$8$:DC:A$5$::D$6/64$