2. Calculate the total time required to transfer a 1.5MB (Mega Bytes) file in the following cases, assuming an RTT of 80ms, a packet size of 1KB, and an initial 2 RTT of handshaking before data is sent (20 points): a) the bandwidth is 10Mbps, and data packets can be sent continuously b) the bandwidth is 10Mbps, but after we finish sending each data packet we must wait one RTT before sending the next. c) the bandwidth is infinite, and up to 20 packets can be send per RTT. d) the bandwidth is infinite, and during the first RTT we can send 1 packet, during the second RTT we can send 2 packets, during the third RTT we can send 4 packets, during the fourth RTT we can send 8 packets, and so on