$10-$Create a separate file named "Solution $2.x|sx|"$

$11-$ Create necessary places $($cells or ranges$)$ for your decision variables, objective function and constraints in the "Solution $2"$ file for the pipeline max flow problem whose data is given in "Data$2"$ sheet

$12-$ The objective is maximizing the total inflow to target cities, write a formula to represent your objective function

$13-$ Write all necessary constraints

$14-$Create your optimization model in solver and solve the problem in Solution$2.$xlsx