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(t)A message signal s(t) = 2cos(6pit) + 5sin(10pit) modulates the carrier signal c(T)100cos(1000πt) using convention AM scheme. The modulator operates with a modulation index of 0.7.= a. Write an expression for the modulated signal x(t). b. Determine and sketch the spectrum of the modulated signal .c. Compare the power contained in the sidebands to the total power in the modulated signal. What is the power efficiency in this AM scheme? d. Calculate the PEP supplied by the AM transmitter.

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