$6\mathrm{.}3$B$-5.$ Multiple Access protocols $(5).$ Consider the figure below, which shows the arrival of $6$ messages for transmission at different multiple access wireless nodes at times t$=0\mathrm{.}1,0\mathrm{.}8,1\mathrm{.}35,2\mathrm{.}6,3\mathrm{.}9,4\mathrm{.}2.$ Each transmission requires exactly one time unit.

For the CSMA$/$CD protocol $($with collision detection$),$ indicate which packets are successfully transmitted. You should assume that it takes $\mathrm{.}2$ time units for a signal to propagate from one node to each of the other nodes. You can assume that if a packet experiences a collision or senses the channel busy and that that node will not attempt a retransmission of that packet until sometime after t$=5.$ If a node senses a collision, it stops transmitting immediately $($although it will still take $\mathrm{.}2$ time units for the last transmitted bit to propagate to all other nodes$).$ Hint: consider propagation times carefully here. Hint: consider propagation times carefully here. $[$Note: You can find more examples of problems similar to this hereLinks to an external site..$]$

$2$

$6$

$5$

$4$

$1$

$3$