Question 4. Helotes Creek Art Gallery

Helotes Creek Art Gallery is considering installing a video camera security system to reduce its insurance premiums. A diagram of the eight display rooms that Helotes Creek uses for exhibitions is shown in the figure below (i.e., Rooms A, B, C ..., H); the openings between the rooms are numbered 1 through 11.

\fMinimize X1+ x2+ X3 + x4+x5+x6+x7+X8+X9+X10+x11