“…Thus, I + is the bounded component of A + , I 0 is the unbounded component of A + , the points A 1 and B 1 are on I 0 , and the points A 2 and B 2 are on I + . Further, by [12,Proposition 7.1], the so-called middle line m separates I + and I 0 , that is, the components I + and I 0 are on different sides of m . Hence the configuration is much like the one seen on Figure 2.…”