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11. [-/1 Points] DETAILS MY NOTES Math 110 Course Resources - Curve Sketching Course Packet on points of diminishing & increasing returns The total monthly revenue R(x) generated from sales of Math t-shirts is related to the amount x spent on advertising by R(X ) = 2x3 - 18x2+ 66x + 80 where x is in thousands of dollars and OS x 5 6. Which one of the following statements is true? $2000 is a point of increasing returns. There are no points of increasing or diminishing returns. $3000 is a point of diminishing returns. $3000 is a point of increasing returns. $2000 is a point of diminishing returns. 12. [0/1 Points] PREVIOUS ANSWERS MY NOTES DETAILS Math 110 Course Resources - Curve Sketching Course Packet on classifying critical points using the second derivative test Use the second derivative test to determine the x-coordinates of the relative extrema of the function g(x) = x4 - 4x3 - 36x2 + 4. Enter each answer as a comma-separated list of values. The order of the values does not matter. Enter DNE if g(x) does not have any relative maximum or minimum values, respectively. x-coordinates of the relative maxima = (0,4) X x-coordinates of the relative minima =