$1\mathrm{.}4\mathrm{.}13\mathrm{.}3$ Maximum Throughput. Consider again the network shown above. Assume that the link with capacity R$1$ is fairly shared $($as we've seen is done via TCP$)$ between the two sessions.

What is the maximum end$-$to$-$end throughput achieve by each session, assuming both sessions are sending at the maximum rate possible?