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Problem 5. (1 point) The following table models the quantity of a drug in the blood at time x (in minutes) X 2.97 2.98 2.99 3 3.01 3.02 3.03 f(x) 12.886 12.857 12.829 12.8 12.771 12.743 12.715 Estimate the rate of change at 3 minutes = to two places of accuracy. Problem 6. (1 point) Find the slope of the secant line between the values x 1 and @2 for the function given below. f(z) = 9x2+ 9x - 7; x1 = -7, 2 =4 The slope is