Complex Number Arithmetic. For each of the following complex numbers z C, (a) Draw the corresponding \"picture\" to help visualize z in the s-plane. (b) Compute the magnitude |z| and phase Zz of z. N - =33 =3 j4. Hint: Your picture should look like Figure 3. Remark: The right triangle formed by the components of z = 3 j4 in the coordinate axes is a 37 53 90 triangle. a=7j4d Figure 3: Visualization of the complex number z = a jw, a > 0