highlight or circle all answers thank you. 7. Grave City is considering the relocation of several police substations to obtain better enforcement in high-crime areas. The locations under consideration, together with the areas that can be covered from these locations, are given in the following table: Potential Locations for Substations Areas Covered A 1, 3, 5 B 2, 4, 5 C 3, 4, 6 D 4, 5, 6 E 1, 5, 6, 7 F 1, 5, 7 G 1, 2, 5, 7 (a) Formulate an integer programming model that could be used to find the minimum number of locations necessary to provide coverage to all areas. If your answer is zero, enter "0," and if the constant is "1