3.4-13 Receiver operation in Selective Repeat. In the SR receiver window (see diagram below, taken from PPT slides and video), why haven't the red packets been delivered yet? Check the one or more reasons below that apply. Selective repeat: sender, receiver windows sond base nextsegnum usable, not yet sont already ack od sent. not yet acked not usablo 4 Windowste N (a) sender view of sequence numbers acceptable within window) out of onder (buffered but already ack od Expected not yot received noutablo windowsze N TV Case b) recover Vw of beendenbom acceptable (within window) not usable out of order (buffered) but already ack'ed Expected, not yet received -window size N rev_base (b) receiver view of sequence numbers Select one or more: a. Red packets have a lower delivery priority up to the application b. There is a packet with a lower sequence number than any of the red packets that has yet to be received, so in order delivery of data in the red packets up to the application layer is not possible. c. There is a packet with a higher sequence number than any of the red packets that has yet to be received, so in-order delivery of data in the red packets to the application layer is not yet possible