If the 723 voltage regulator is used to realize an output voltage V_o = 10 V with a 1-kΩ load, calculate the output resistance and the loop gain of the regulator. If a 500-Ω load is connected to the regulator in place of the 1-kΩ load, calculate the new value of Vo. Use SPICE to determine the line regulation and load regulation of the circuit. Use I₁ = 1 mA, β = 100, V_A = 100 V, I_s = 10⁻¹⁵ A, and r_b = 0.