2. Consider the following network. Estimate the mean delay experienced by a packet transmitted via this node. [Hint - fairly straight forward application of M/M/1 equation - check numbers make sense. Numerical answer not given as it means you will not think - there are 4 numbers and the key equation has only 3 variables!] Comment upon the change in delay if the arrival rate is increased 10 -fold to compensate for the same increase in service rate. [Hint - does the increase in one cancel out the other? So delay is the same .. or? Look at equation to see what happens.J What is the minimum output line capacity required by a node located at the end of link B. [Hint - think about the constraint on the arraival rate compared to departure rate-look at worse case when all traffic on A going through B is then funnel through the same outgoing link on the node at B]