$13\mathrm{.}22$ Assign the acid in each set its appropriate $p{K}_a($See

Example $13\mathrm{.}2)$

$($a$)$

and

and $3\mathrm{.}14)$

$($b$)$

and

$($c$)$

and

$($p $K_{a}3\mathrm{.}58$ and $2\mathrm{.}49)$

$($d$)$

and $C{H}_{3}C{H}_2\frac{C}{O}OH$

and $4\mathrm{.}78$