3. (a) In the context of multicast routing, (i) state the objective of a multicast distribution tree; (ii) describe and compare two mulitcast distribution tree construction techniques. Use Fig. 2 to illustrate the operation of both of the multicast distribution tree con- struction techniques you have described. Source 1 Source 2 F Receiver 1 Receiver 2 Figure 2: Illustrate multicast routing using this network which consists of two sources, source 1 and source 2, two destinations, receiver 1 and receiver 2 and six routers, A, B, C, D, E and F. (5 Marks] 3. (a) In the context of multicast routing, (i) state the objective of a multicast distribution tree; (ii) describe and compare two mulitcast distribution tree construction techniques. Use Fig. 2 to illustrate the operation of both of the multicast distribution tree con- struction techniques you have described. Source 1 Source 2 F Receiver 1 Receiver 2 Figure 2: Illustrate multicast routing using this network which consists of two sources, source 1 and source 2, two destinations, receiver 1 and receiver 2 and six routers, A, B, C, D, E and F. (5 Marks]