A vestigial sideband modulation system is shown below. The bandwidth of the message signal m(t) is W and the transfer function of the bandpass filter is shown in the figure. a) Determine hl (t) the lowpass equivalent of h(t), where h(t) represents the impulse response of the bandpass filter. b) Derive an expression for the modulated signal u(t). m(t) u(t) BPF Hf) VSB signal A cos (2mf) Hf) -fe