HELP PLEASE

$3.(30$ points$)$ Three refineries send a gasoline product to two distribution terminals through a pipeline network. The pipeline network is served by three pumping stations, as shown in the network below. The product flows in the network in the direction shown by the arrows. The capacity of each pipe segment is shown on each arc in units of millions of barrels per day. Find a maximum flow in the network. Use TORA to verify your results. Include a TORA screenshot of your results with your submission.

Hint: For this problem, add a "source node" $\backslash ($ r $\backslash )$ to the network, and an arc of infinite capacity from $\backslash ($ r $\backslash )$ to each of the refinery nodes. Then add a "sink node"

$\backslash ($ s $\backslash )$ to the network, and an arc of infinite capacity from each terminal node to $\backslash ($ s $\backslash ).$ Then find a maximum flow from $\backslash ($ r $\backslash )$ to $\backslash ($ s $\backslash ).$