From the list below, select all values of a for which the derivative does not exist. 1 2 3 4 5 6 8 None of the above Q6.2 1 PointQ8.3 1 Point Find the value of t in the interval [1, 5] where the object changes direction. Round your answer to three decimal places. Enter your answer here Q8.4 1 Point How many values of t > 5 are there for which the object changes direction at t? Oo O 1 O 2 0 3 0 4 5 or moreThe graph of y = f(a) is given below. 5 4 3 2 O -1 2 w 4 5 6 7 8 Q6.1 1 Point From the list below, select all values of x for which the derivative does not exist.From the list below, select all values of a for which f' (ac) > 0. 01 2 3 04 105 6 8 None of the aboveFrom the list below, select all values of x for which the graph of f has a horizontal tangent line. 2 3 14 15 07 8 None of the above Q6.3Suppose an object moves in a straight line with a coordinate given by the position function s (t ) = ; - Q8.1 1 Point What is the instantaneous velocity at t = 1? Enter your answer here Q8.2 1 Point What is the instantaneous acceleration at t = 1? Enter your answer here Q8.3 1 Point Find the value of t in the interval [1, 5] where the object changes direction