Given the signals x[n] = 2ⁿ (u[n] − u[n − 3]) and  y[n] = 0.5ⁿ (u[n] − u[n − 3]) write a matrix equation to compute their circular convolution of lengths N = 3, 4, and 5. Call the results z[n],w[n],  and v[n], respectively. For which of these lengths does the circular and  the linear convolutions coincide? Explain.