Identify the three botnets. In Figure 2.21, three botnets are identified by name: Ozdok, Bobax, and Srizbi. The dashed lines in the plot represent the residuals.

(a) Make a sketch of the residual plot in Figure 2.22, and write in the names of the botnets Ozdok, Bobax, and Srizbi.

(b) Explain how you were able to identify these three points on your sketch.