NAMestion 2) [20 marks] Switching modulator is used to generate a modulated signal s(t). Assume m(t) = 4ncos (21000t) and c(t) = 32cos(2π10,000) i. ii. iii. iv. V. vi. [1 marks] What type of modulation can the above modulator generate? [3 marks] Draw a block diagram of the switching modulator. [1 marks] Find the bandwidth of m(t). [3 marks] Sketch the spectrum of s(t), then find its bandwidth. [2 marks] Is the transmission over modulated? Explain. [2 marks] Modify the above modulator to generate lower side band modulated signal. b) [8 marks] Given g(t) ==- 2rect(). Sketch the spectrum of g(t) from -1.5 to 1.5 Hz. Then calculate the bandwidth that can give almost 95% of the total power.