3. A CT signal x() is shown in the figure. Sketch each of the following signals. (a) (01-0 (b) (9[:( - (t-1)] (c) 400(t- 2 -1 0 1 2 2. Given the DT signals xi{n) and X:{n) shown in the figure. Represent each of the following signals graphically and as a vector (sequence of numbers). (a) ya(n) = xy(n)+x2(n) (b) y=(n) = 2x(n) (c) y(n) = x1(n) x2) -2 -1 2101 2 3 4 5 6 7 -3