Let P, Q and R be the ISPs of below exercise. This time, suppose customer C switches from provider Q to provider R. R will now have a new entry 52.14.0.0/16 C. Give the changes to the forwarding tables of P and Q.

_{Suppose P, Q and R are ISPs with respective CIDR address blocks (with bytes in decimal) 51.0.0.0/8, 52.0.0.0/8 and 53.0.0.0/8. P then has customers A and B, to which it assigns address blocks as follows:}

_{A: 51.10.0.0/16}

_{B: 51.23.0.0/16}

_{Q has customers C and D and assigns them address blocks as follows:}

_{C: 52.14.0.0/16}

_{D: 52.15.0.0/16}

_{(a).Give forwarding tables for P, Q and R assuming they connect to each other and to each of their own customers.}

_{(b). Now suppose A switches from provider P to provider Q, and takes its address block with it. Give the changes to the forwarding tables for P, Q and R; the longest-match rule will be needed to resolve conflicts.}