a $2.(20$ pts$.)$ Suppose users share a $10$ Mbps link. Also, suppose each user requires $500$ kbps when transmitting, but each user transmits only $5$ percent of the time.$($e$)(3$ pts$.)$ On average how many users are active simultaneously?$($f$)(3$ pts$.)$ If each user transmits at $10$ percent of the time. Will the answer in part $($d$)$ increase or decrease? Why?