You are given the table below. X 4 12 16 20 fix 11 28 16 5 32 Use the table and n = 4 to estimate the following. Because the data is not monotone (only increasing or only decreasing), you should sketch a possible graph and draw the rectangles to ensure you are using the appropriate values for a lower estimate and an upper estimate. 20 F ( x ) dx lower estimate 324 X upper estimate 240 X