Assume the periodic message signal m(t), shown below, is applied to a phase modulator with a phase sensitivity of kp-2n rad/Volt. Assume a carrier frequency of fe=1 Hz. a) Sketch the phase of the carrier signal (without modulation) versus time. b) Sketch the phase of the modulated signal versus time. c) Sketch the phase modulated wave produced by this modulator VV 1 0 0.0 1.0 2.0 3.0 4.0 A Time, sec