Note: Please make sure to properly format your answers. All dollar figures in the answers need to include the dollar sign and any amount over 1,000 should include the comma ($2,354.67). All percentage values in the answers need to include a percentage sign (6). For all items without specific rounding instructions, round your answers to two decimal places, show both decimal places (5.06). Use the following table to answer each question. Monthly Water Bills Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec X1 X 2 X3 X4 X 5 X 6 X7 X8 X 10 X11 X12 $40 $42 $40 $38 $48 $50 $58 $62 $56 $46 $44 $44 6. Using sigma notation find the mean water bill for the entire year. Round your answer to the nearest cent. 7. Using sigma notation find the mean water bill for the first 6 months of the year. Round your answer to the nearest cent. 8. Using sigma notation find the mean water bill from April through November. Round your answer to the nearest cent