2 7 5 T 5 4 B D 7 C E 4 This is the same network as in problem 4. A second problem park management needs to solve is that, because of the hilly terrain making cell communication spotty, telephone lines must be installed under all the roads to establish telephone communications among all the stations (including the park entrance). Because the installation is expensive and disruptive to the natural environment, lines will be installed under just enough roads such that all stations are connected to the telephone system. The question is, where the lines should be laid to accomplish this with a minimum number of miles of line installed. Solve this problem for the park management