Calculate the bandwidth $$ delay product for the following links. Use one$-$way delay, measured from first bit sent to first bit received.

$($a$)10-$Mbps Ethernet with a delay of $10s.$

$($b$)10-$Mbps Ethernet with a single store$-$and$-$forward switch like that of Exercise $17($a$),$ packet size $5000$ bits, and $10$ ser link propagation delay.

$($c$)1\mathrm{.}5-$Mbps TI link, with a transcontinental one$-$way delay of $50ms.$

$($d$)1\mathrm{.}5-$Mbps T$1$ link through a satellite in geosynchronous orbit, $35,900km$ high. The only delay is speed$-$of$-$light propagation delay.