A metropolitan park is planned to be built. According to the plans, the land, consisting of 5,000 acres, will be planted with trees. Dining areas, artificial lakes, sport facilities and other facilities will be constructed in the planted area. In the figure below, the nodes represent the various facilities to be built. The branches represent corridors which can be constructed to interconnect the various facilities while the numbers above the branches indicate distance measured in kms.

How to connect directly or indirectly all facilities with the least possible total area of paved corridors??

Use the appropriate network analysis technique to solve the problem.