A family of $4$ has one member constantly playing video games. A second member is always on youtube watching videos. The third is always downloading large hi$-$def videos. The forth is only checking his$/$her e$-$mails once in a while. Which wireless standard is most suitable for them?

Question $12$ options:

$802\mathrm{.}11$ac SU$-$MIMO

$802\mathrm{.}11$g SU$-$MIMO

$802\mathrm{.}11$g MU$-$MIMO

$802\mathrm{.}11$ac MU$-$MIMO

$802\mathrm{.}11$ac SU$-$MIMO

$802\mathrm{.}11$b MU$-$MIMO