Consider hosts X, Y, Z, W and bridges (or Layer 2 switches) B1, B2, B3 with initially empty MAC forwarding tables, as in Figure 2. P1 PO 1 Figure 2 a) Suppose X sends to W. Which bridges learn where X is? Does Y's network interface see this packet? Give the current forwarding tables for each of the bridges B1, B2, B3 Table B1: Table B2: Table B3: b) Suppose Z now sends to X. Which bridges learn where where Z is? Does Y's network interface see this packet? Give the current forwarding tables for each of the bridges B1, B2, B3 Table B1: Table B2: Table B3: c) Suppose Y now sends to X. Which bridges learn where Y is? Does Z's network interface see this packet? Give the current forwarding tables for each of the bridges B1, B2, B3 Table B1: Table B2: Table B3: d) Finally, suppose W sends to Y. Which bridges learn where W is? Does Z's network interface see this packet? Give the current forwarding tables for each of the bridges B1, B2, B3 Table B1: Table B2: Table B3