calculate Σx and Σx² for the given data set: Data set: 0.51, 1.80, 1.52, 2.05, 1.03, 1.18, 0.80, 1.33, 1.29, 1.13, 3.34, 1.54, 0.08, 0.12, 0.60, 0.72, 0.92, 1.05, 1.43, 3.04, 1.81, 2.17, 0.63, 0.56, 0.03, 0.09, 0.18, 0.34, 1.51, 1.45, 1.52, 0.19, 1.55, 0.02, 0.07, 0.65, 0.40, 0.24, 1.51, 1.45, 1.60, 1.80, 4.69, 0.08, 7.89, 1.58, 1.62, 0.03, 0.23, 0.72