need to list more than one set for each answer. $($Select all that apply.$)$

$($a$)15$

$Z$

$Q$

$Q^{\text{'}}$

R

$($b$)6\mathrm{.}28$

$N$

$Z$

$Q$

$Q$

$R$

$($c$)1\mathrm{.}4646464646$dots

$N$

$Z$

$Q$

$Q$

$R$

$($d$)\sqrt[\phantom{2}]{2}$

$N$

$Z$

$Q$

$C$

$R$