The new Health-Watch facility is targeted to serve seven census tracts in Erie, Pennsylvania, whose latitudes and longitudes are shown in Table 13.1, along with the population in each census tract (in thousands). Customers will travel from the seven census-tract centers to the new facility when they need health care. What is the target area's center of gravity for the Health-Watch medical facility?

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Census Tract 15 16 17 25 26 27 28 Total Population 2,711 4,161 2,988 2,512 4,342 6,687 6,789 30,190 Latitude Longitude Population X Latitude 42.134 -80.041 42.129 -80.023 42.122 -80.055 42.112 -80.066 42.117 -80.052 42.116 -80.023 42.107 -80.051 114,225.27 175,298.77 125,860.54 105,785.34 182,872.01 281,629.69 285,864.42 1,271,536.04 Population X Longitude -216,991.15 -332,9/5./0 -239,204.34 -201,125.79 -347,585.78 -535,113.80 -543,466.24 -2,416,462.80