3. In class, we compared the operation of a stop-and-wait protocol with the operation of a pipelined protocol for communication between a host located on the West Coast of the United States and a host located on the East Coast (see the figure below). Suppose the speed-of-light round-trip propagation delay (RTT) between these hosts is 30 milliseconds. Also, suppose these hosts are connected by a channel with a transmission rate of 1.5 Gbps. If the size of a packet is 1,500 bytes (including both header fields and data), how big would the window size have to be for the channel utilization to be greater than 95 percent? data packet data packets ACK packets (a) a stop-and-wait protocol in operation (b) a pipelined protocol in operation