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4 70 100 1400 101 <br /> 5 139 110 2780 124 <br /> 6 151 120 3624 128 <br /> 7 168 134 -5544 134 <br /> -3 -45 87 <br /> plot 72 <br /> ------------------------------------------------------ <br /> ------------------------------------------------------ <br /> XS 1 *********FILL SECTION AREA = 238 <br /> ------------------------------------------------------ <br /> POINT X Y X*(Y-Y) <br /> ------------------------------------------------------ <br /> 4 59 86 <br /> 1 0 66.5 0 <br /> 2 35 70 472.5 <br /> ' 3 50 80 800 <br /> i <br /> ' 4 59 86 -796.5 <br /> i <br /> ' 1 0 66.5 <br /> ' 250 128.5 ' <br /> ' -50 <br /> i <br /> ------------------------------------------------------� <br />