2. A periodic signal has the following Fourier series representation v(t)=\sum_{n=1}^{\infty} \frac{3}{2 n-1} \cos 2 \pi n 3000 t \text { is passed through an ideal low-pass filter with } cutoff frequency of 11 KHZ. Plot the spectrum of the input signal up to 20 KHZ. b. Plot the spectrum of the output signal. с.What is the output signal bandwidth? d. Calculate the power contained in the output signal.