The city of Nayanagar consists of five subdivisions. The Mayor wants to build fiber optic communication lines to ensure that all the subdivisions are connected for highspeed communications. Direct connection between two subdivisions is not important. The distance between the subdivisions are given in the following figure. What is the minimum length of fiber optic communication lines required? Assume that no connection can be built between subdivisions 1 and 4. 1 5 3 5 5 3 7 3 5 5 2 7