Need step-by-step solution via Excel Solver. From Chapter 6.3 (Maximum Flow Problems) of Introduction to Management Science: A Modeling and Case Studies Approach with Spreadsheets (Fredrick Hillier, 6th Edition.). Please do not respond just to say you cannot solve this, which delays others from answering. Many thanks.

A city would like to know how many vehicles it could move through its streets in an emergency. The most likely situation is an evacuation starting at the school and ending at the park. The connections between these two locations, plus their capacity and direction, is shown below. Oak Street F A F Street School Park B G Elm Street 2nd Street E A Path Capacity B 30 C 25 D 5 E 5 F G 5 | 5 15 (Round your answer to the nearest whole number.) Maximum Flow