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5.55 In the circuits shown in Fig. P5.55, transistors are characterized by Vt = 1 V, kW/L = 4 mA/V2, and λ = 0. (a) Find the labeled voltages V1 through V7. (b) In each of the circuits, replace the current source with a resistor. Select the resistor value to yield a current as close to that of the current source as possible, while using resistors specified in the 1% table provided in Appendix J.