Hi, I need help understanding price elasticity of demand and how to graph it

Given the following information on quantity demanded for each price level. a) Fill in the following table for the price elasticity of demand and total revenue. Note: Please round your answer for price elasticity to two decimal places. 00000000 1 2 3 4 5 6 7 8 b) Graph the demand curve. Demand Curve 27- 24- Price Per Unit ($/Q) 21- 18- 15 12 NO- Co. 5 Reset 6 Quantity (units/week) COc) Graph the total revenue curve. Note: You must plot all the points to receive full marks. v Total Revenue Curve 3 g c g I .3 . . --------------- 8 0 i QuantitHunltsMeok)