Assignment:
Consider the network shown in Fig, where the numbers next to the arcs consists of the lower and upper bound on the flow in the arc, while the double-digit numbers next to the arcs indicate the per-unit cost of the flow through the arc. In addition, we want to ensure that a total of five units flow from the source to the sink and exactly two units flow through the node n3. Formulate.
Provide complete and step by step solution for the question and show calculations and use formulas.