Q 4(b) [6 Marks] Discuss the following service disciplines in terms of their ability to support Quality of Service requirements for different traffic classes. i) First Come First Served ii) Priority iii) Weighted Fair Queuing Q 4(c) [13 Marks] Consider a Weighted Fair Queuing scheme where ri is the average rate of flow i, wi is the WFQ weighting of flow i, bi is the maximum burst size of flow i and R is the overall bandwidth. Show that as long as r1