7. Estimate the mean delay per packet for the network and traffic matrix shown below. when the mean packet length is 750 bits. Repeat the previous example with the traffic matrix given at the end of the tutorial. [Hint - simple example with non-symmetric traffic and routes. 2nd part same again use table in question 11.] 7 One possible mechanism for controlling congestion would be to discard packets if the number of packets in a queue exceeded a certain level. Derive an expression which could be used to estimate the proportion of packets discarded. (Hint - use M/M/1 state diagram) [Hint - look at proof in notes and see what we did for Erlang equations - not a lot of maths. Not really derive as I have done that already - just "find"]