3 [10 pts] Two hosts A and B are connected to a store-and-forward switch S via 100 Mbps links. Assume packet size is 10,000 bits The propagation delay on the link frorn A to S is 60 ps and from S to B is 70 8 (in either direction of transmission). The switch S begins retransmitting a received packet 20 us after it has finished receiving it 1. How long does it take to transmit a packet from host A to host B 2. What is the RTT of a packet between hosts A and B