Consider a package of length L which begins at end system A, travels over one link to a packet switch, and travels from the packet switch over a second link to a destination end system. Let di, si, and Ri denote the length, propagation speed and the transmission rate of link i for i=1,2. The packet switch delays each packet by dproc. Assuming no queuing delay, in terms of di, si, Ri (i=1,2) and L, what is the total end-to-end delay for the packet?