Consider two hosts, one located on the West Coast of the United States and the other located on the East Coast. The round trip propagation delay between these two end systems, RTT, is 30 milliseconds. Suppose that they are connected by a channel with a transmission rate, R, of 1Gbps. With a packet size, L. of 1,000 bytes per packet, including both header fields and data, how big would the window size have to be for the channel utilization to be greater than 80%? Show all your work