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8. Determine the equation of the tangent to the curve defined by y = In x - 1 that is parallel to the straight line with equation 3x - 6y - 1 = 0. 9. a. If f(x) = (x In x), determine all the points at which the graph of f(x) has a horizontal tangent line.11. The velocity, in kilometres per hour, of a car as it begins to slow down is given by the equation v(t) = 90 - 30 In(3t + 1), where t is in seconds. a. What is the velocity of the car as the driver begins to brake? b. What is the acceleration of the car? c. What is the acceleration at t = 2? d. How long does the car take to stop