Consider the following method for congestion control in the error-free virtual circuit subnet. A router may only transmit ACK for a received packet if it knows packet transmission along with the virtual circuit through subsequent routers is successful. Assume that each router utilizes stop-and-wait ARQ and offer one buffer (large enough for one packet) for every VC in each direction of the traffic. If each router takes T sec to transmit the packet (data or ACK) to the next router and there are N routers on VC, at what rate data packets are delivered to the destination host?