4) Suppose that two stations A and B are contending for the channel and 'B' has just finished a conversation with another node in the network. Based on this information, answer the following questions: [1+2+3] a) How long (give the IFS name) will A sense the channel for idleness before it transmits data? How long will B sense the channel for idleness before it transmits data? Assume that another station C who is within hearing range of A is also sensing the channel around the same time as A and B. C waits for the requisite IFS period of time and then chooses a backoff time of 10 slots before transmission. Assume that A starts its transmission at a time that corresponds to the middle of slot period number 5. What does C do then? b) c) 4) Suppose that two stations A and B are contending for the channel and 'B' has just finished a conversation with another node in the network. Based on this information, answer the following questions: [1+2+3] a) How long (give the IFS name) will A sense the channel for idleness before it transmits data? How long will B sense the channel for idleness before it transmits data? Assume that another station C who is within hearing range of A is also sensing the channel around the same time as A and B. C waits for the requisite IFS period of time and then chooses a backoff time of 10 slots before transmission. Assume that A starts its transmission at a time that corresponds to the middle of slot period number 5. What does C do then? b) c)