Q 5 In the network shown in Figure 1, the source wants to send a message of P bits to the destination. Both links are of length L each and can support a data-rate of R. The rate at which the signal travels over the links is C. The source is allowed to split the message into multiple packets. A header of Ph bits is added to every packet that leaves from the source. Assume that this source destination pair has exclusive access to the network. Router (store-and-forward) Figure 1: A wired network consisting of a source, a destination and a router. (a) What is the minimum possible value of the end-to-end delay? (b) If the destination imposes a constraint that the end-to-end delay should not be greater than twice the minimum possible value obtained in Part (a), and the source pays the network c units for each bit it transmits, what can the source do to minimize its expenses