COS X Where is the first local minimum of f(x) = on the interval (0,co) located? X COS X The first local minimum of (x) = occurs at x 8 X (Round to six decimal places as needed.)Sketch a function that changes from concave up to concave down as x increases. Describe how the second derivative of this function changes. Choose the graph that goes from concave up to concave down as x increases. O A. O B. O C. OD. Q Choose the phrase that best describes the behavior of the second derivative of the function. O A. The second derivative is constant. O B. The second derivative changes from positive to negative as x increases. O C. The second derivative approaches 0 as x increases. O D. The second derivative increases without bound as x increases. O E. The second derivative changes from negative to positive as x increases.Evaluate the derivative of the following function. f(x) = 6 sinh " ( tan x) f(x) =