In this question, you are provided with the following arrays that contain electricity usage data for various classes of consumers, e.g., residential, commercial, and industrial. The usage data represents the average US electricity consumption/day for years 2006 to 2020 in the month of July. The average usage data are ) 10^9 kWh/day. residential = [ 2.861 3.0484 3.2602 3.342 3.3555 3.4234 3.5268 3.9185 3.9718 3.854 3.8934 4.3127 4.2153 4.1711 4.6605 ] commercial = [2.5348 2.553 2.7084 2.8097 2.9167 3.9299 3.6561 3.3057 3.4761 3.4748 3.5968 3.7088 3.7172 3.7257 3.9367] industrial = [2.6408 2.74 2.7345 2.8019 2.796 2.8579 2.8597 2.8757 4.000 3.8998 2.6826 2.8427 2.8301 2.8542 2.8512] The price data per kWh is given as follows: Residential: $0.114 (11.4 cents) Commercial: $0.1319 (13.9 cents) Industrial: $0.0672 (6.72 cents)