A communication system has an average data rate of $35000$ packet $\frac{?}{s}$ and bust rate limited only by line rate $={}_1=145Mbps.$ Assume that one sample time period $T$ is $1ms.$ The packet size is $64$ bytes.

$($I$)$ Determine the average number of packets received in one time step. $(3$ morks

$($II$)$ Calculate the maximum number of packet that could be received in $1ms.(5/$mer

$($III$)$ Find the average number of time stepsbetween the packets $(3$ markS$)$

$($IV$).$ Explain what is meant by a bursty source. $(2$ morks$)$