$28.$ Calculate the voltages $\backslash (\backslash$mathbf$\{$V$\}\_\{1\}\backslash )$ and $\backslash (\backslash$mathbf$\{$V$\}\_\{2\}\backslash )$ for the circuits in Fig. $15\mathrm{.}100$ in phasor form using the voltage divider rule.

$($a$)$

$($b$)$

FIG. $15\mathrm{.}100$

Problem $28.$