The output of a circular convolution performed on two signals x₁(n) = {2, 1, 2, 1} and x₂(n) = {1, 2, 3, 4} is:
o {16, 14, 16, 14}
o {14, 16, 14, 16}
o {12, 14, 12, 14}
o {14, 12, 14, 12}