%Chapter 9 E9_2_1:=[21.24, 24.81, 23.62, 26.82]: E9_2_2:=[350,353,354,356,353,352,354,355,357,353,354,355]: E9_2_6:=[425,710,661,664,732,714,934,761,744,653,725,657,421,573, 535,602,537,405,874,791,721,849,567,468,975]: