Consider the figure below, where a TCP sender sends 8 TCP segments at t = 1, 2, 3, 4, 5, 6, 7, 8. Suppose the initial value of the sequence number is 0 and every segment sent to the receiver each contains 100 bytes. The delay between the sender and receiver is 5 time units, and so the first segment arrives at the receiver at t=6. The ACKs sent by the receiver at t=6, 7, 8, 10, 11, 12 are shown. The TCP segments (if any) sent by the sender at t = 11, 13, 15, 16, 17, 18 are not shown. The segment sent at t=4 is lost, as is the ACK segment sent at t=7. t=1 T t=2+ t=31 TCP sender t=4 " t-5- data segment data segment data segment TCP receiver t=6- data segment data segment data segment t=6 t=7 data segment t=8 ACK data segment t-9 t=10 t=11 t=11 ACK t=12 t=12 t=13 t=13 t=14 ACK t=15 ACK t=16 ACK t=17 ACK t=18 a) What is the sequence number of the segment sent at t=2? b) What is the ACK value carried in the receiver-to-sender ACK sent at t=6? c) What is the ACK value carried in the receiver-to-sender ACK sent at t-8? d) What is the ACK value carried in the receiver-to-sender ACK sent at t = 10?