Suppressed Carrier Double side band system

In a Suppressed Carrier Double side band system, the carrier is c(t) = 10 cos(2πfct), where fc = 1000Hz, and the message signal is given by m(t) = sinc(t) + sinc2 (t) (a) Find the time domain representation of the modulated signal, u(t). (b) Sketch the magnitude and phase of frequency domain representation of the modulated signal. (c) What is the bandwidth of the modulated signal? (d) The modulated signal u(t) in part (a) is again multiplied by the signal c1(t) = 2 cos(2π2fct), where fc = 1000Hz. Sketch the magnitude of frequency domain representation of the this signal.