For the folded-cascode differential amplifier of Fig. 9.38, find the value of VBIAS that results in the largest possible positive output swing, while keeping Q3: Q4: and the pnp transistors that realize the current sources out of saturation. Assume VCC = VEE =5 V. If the dc level at the output is 0 V, find the maximum allowable output signal swing. For I = 0.5 mA, βP =50, βN =100, and VA =100 V find Gm, Ro4, Ro5, Ro, and Ad.