Question 15
Use the given information and answer the subquestions : Seven computers { } are linked by a network, and each link has a maintenance cost. The graph below shows how the computers are linked. Each node represents a computer, each edge represents a link between a pair of computers, and weights on the edges represent the maintenance cost (in hundreds of rupees). The goal is to pick a subset of links such that the total maintenance cost is minimum and the computers remain connected through the chosen links.
Find the number of different ways of choosing an optimum subset of links for the given graph.