QUANTITATIVE COMPARISON OF PACKET SWITCHING AND CIRCUIT SWITCHING

This question requires a little bit of background in probability $($but we'll try to help you though it in the solutions$).$ Consider the two scenarios below:

A circuit$-$switching scenario in which Ncs users, each requiring a bandwidth of $25$ Mbps$,$ must share a link of capacity $100$ Mbps$.$

A packet$-$switching scenario with Nps users sharing a $100$ Mbps link, where each user again requires $25$ Mbps when transmitting, but only needs to transmit $20$ percent of the time.