Q4) The table below shows the distances (km) between 7 facilities. All facilities must be reached within 45 km. Write the set covering model including objective function and constraints in an open form (25 points). 1 2 3 4 1 5 3 0,00 46,01 0,00 59,94 84,21 0,00 35,81 11,18 74,01 0,00 59,24 22,85 79,71 26,02 0,00 68,88 54,04 58,00 50,45 35,47 0,00 7 80,65 42,19 93,30 47,38 21,59 38,83 0,00 4 5 6