g7_masa =  np.array([1.41,0.82,0.40,0.44,1.28,2.01,1.58,0.65,0.40])
g7_largo = np.array([15.63,8.46,12.05,9.26,8.05,8.23,12.52,8.62,8.99])
g7_ancho = np.array([8.16,6.44,5.80,7.04,6.96,8.58,16.12,8.50,3.40])
g7_area = np.array([84.26,40.36,43.50,36.00,41.13,49.86,116.92,39.87,19.43])
a=0.57
error = 0.22