$1.$ Perform $0$ compression and leading $0$ compression $($include : and$/$or : : when needed$)$

$2010$:$00$A$7$:$000$C:$0000$:$0000$:$0000$:$0005$:$0800$

$2.$ Expand the number into the full $128$ bit address

$2001$:$6$:$0$:$3$::$4$

$3.$ Given the mac address $0801$:ABCD:$2345,$ what is the eui$-64$ Link$-$Local address

$4.$ Given $2001$:db$8$::$2345$:$78$FF:FE$9$A:$7654,$ what is the mac address?