Determine and sketch the frequency response of the system y (n) = x (n) x (n − 1) - 2. An FIR Filter is described by the difference equation y (n) = x (n) + x (n - 10) a. Determine the magnitude and phase response b. Determine the response to the input x (n) = cos n + 3 sin (n + 1) -[infinity]0≤n≤[infinity]0