Performance: Maximum Throughput and Capacity. Given that in the figure below, the maximum achievable throughput from Sa to Da is known to be $10$ Mbps$,$ and the maximum achievable throughput from Sc to Dc is known to be $30$ Mbps$,$ what is the maximum throughput achievable from Sb to Db$.[$Hint: think about link R$7.$ Do all sessions passing through R$7$ have the same maximum achievable throughput in this network setting?$]$

image.png

Group of answer choices

$100$ Mbps

$40$ Mbps

$60$ Mbps

$80$ Mbps

$20$ Mbps