(20 points) The impulse response of a linear time-invariant sys The input to the system is: h(n) ={1,2,3) for 0≤ n ≤2. x(n) = {1,2,2, 1} for 0 ≤ n ≤3. Find y(n) (the linear convolution of h(n) and x(n)) using the circular convolution method.