4. A mobile device is visiting a foreign network. Assume its home IP address is 167.12.69.20, its home-agent (HA)'s address is 167.12.69.118, and its foreign agent (FA)'s address is 35.91.70.13. The foreign agent address is also the mobile's care-of address (COA). A correspondent with an IP address of 53.107.91.81 is sending a datagram to the mobile device. a) Draw a figure to illustrate how the packet is transmitted from the correspondent to the mobile device using mobile IP with indirect routing. [5 points] b) What are the source and destination addresses in the header of the IP packet sent from the correspondent to the mobile device as it travels from: [15 points] (i) correspondent to home agent; Source IP address: Destination IP address: (ii) HA to FA (including the outer and inner source addresses (SA) and the outer and inner destination addresses (DA) in the encapsulated IP packet, respectively) Outer source IP address: Outer destination IP address: Inner source IP address: Inner destination IP address (iii) FA to mobile device. Source IP address: Destination IP address