Calculate \(\left[\mathrm{OH}^{-}ight],\left[\mathrm{H}^{+}ight]\), and the \(\mathrm{pH}\) of \(0.20 \mathrm{M}\) solutions of each of the following amines.

a. triethylamine \(\left[\left(\mathrm{C}_{2} \mathrm{H}_{5}ight)_{3} \mathrm{~N}, K_{\mathrm{b}}=4.0 \times 10^{-4}ight]\)

b. hydroxylamine \(\left(\mathrm{HONH}_{2}, \mathrm{~K}_{\mathrm{b}}=1.1 \times 10^{-8}ight)\)