For the circuit in Figure P17.15, assume transistor and diode parameters of \(V_{B E}(\) on \()=0.7 \mathrm{~V}\) and \(V_{\gamma}=0.4 \mathrm{~V}\). Neglect base currents. Find \(i_{1}, i_{2}, i_{3}, i_{4}\), \(i_{D}\), and \(v_{O}\) for:

(a) \(v_{X}=v_{Y}=-0.4 \mathrm{~V}\),

(b) \(v_{X}=0, v_{Y}=-0.4 \mathrm{~V}\),

(c) \(v_{X}=\) \(-0.4 \mathrm{~V}, v_{Y}=0\),

(d) \(v_{X}=v_{Y}=0\).

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