Please see the attached problem. CHB, Inc., is a bank holding company that is evaluating the potential for expanding into the state of Ohio. State law permits establishing branches in any county that is adjacent to a county in which a PPB (principal place of business) is located. The following map shows the State of Ohio. The Web file CHB contains an adjacency matrix with a one in the ith row and jth column indicating that the counties repsented by the ith row and the jth column share a border. A zero indicates that the two counties do not share a border. Solve a linear binary model that will tell CHB the minimum number of PPB's required and their location in order to allow CHB to put a branch in every county in Ohio