(a) In the firewall configuration shown below, assign appropriate security levels to parts of the configuration labeled A, B, and C. For this question, three security levels are enough, e.g., Low, Medium and High. Host C A Bastion Host B Router with packet filter Router with packet filter C Internet Protected Network Public Server (b) Explain the firewall configuration's strengths by the use of the assigned security levels, using at most five sentences. (c) A packet is sent from the Internet to an application running on Host C. Messages for the application require inspection by the firewall configuration. Describe the actions taken by each device in the packet's path from the Internet to Host C, using at most two sentences for each device.