Build a regular expression that captures all Media Access Control Addresses $($MAC address$)$

which is a $12$ digit hexadecimal where each pair of hexadecimal numbers is separated by

a colon or hyphen. Additionally, MAC address is also valid where three groups of four

hexadecimal digits are separated by dots$(.)$ Make sure you support your answer with proper

reasoning. Here are some of the MAC addresses that your regex should match $($this list is

not exhaustive$).$

Keep in mind Hexadecimal numbers range $0$ to $9$ and letters from a to f and A

to F

$01-23-45-67-89-$AB

$01$:AB:$45$:CD:$89$:EF

$0123\mathrm{.}4567\mathrm{.}89$AB