A circuit consists of five voltages, namely, \(v_{\mathrm{a}}, v_{\mathrm{b}}, v_{\mathrm{c}}, v_{\mathrm{d}}\), and \(v_{\mathrm{e}}\). The voltage from \(v_{\mathrm{a}}\) to \(v_{\mathrm{b}}\) is \(-5 \mathrm{~V}\), from \(v_{\mathrm{b}}\) to \(v_{\mathrm{c}}\) is \(10 \mathrm{~V}\), from \(v_{\mathrm{a}}\) to \(v_{\mathrm{e}}\) is \(-2 \mathrm{~V}\), and from \(v_{\mathrm{b}}\) to \(v_{\mathrm{d}}\) is \(8 \mathrm{~V}\).

(a) If one wanted to eliminate negative voltages, which voltage would be best to select as ground?

(b) What would all the remaining voltages be with your ground selection?