Given a sinusoid \(v_{1}(t)\) whose phasor is \(\mathbf{V}_{\mathbf{1}}=4-j 3 \mathrm{~V}\) and its frequency is \(10 \mathrm{rad} / \mathrm{s}\), use phasor methods to find a voltage \(v_{2}(t)\) that equals \(20 d v_{1}(t) / d t-5 v_{1}(t)\).