Consider the queuing delay in a router buffer. Let I denote traffic intensity; that is, I = La/R, where L is the packet length (number of bits /packet) and a is the packet rate (number of packets/sec). Suppose that the queuing delay is represented by the formula as IL/R (1 I) for I < 1. a) Update the formula for the total delay, that is, the queuing delay plus the transmission delay. b) Let x = L/R, simplify the total delay formula in (a) as a function of x. List the two values of x which produces the total delay values as 0 and infinity.