Below is the graph of the derivative of a function defined on the interval (0,8). You can click on the graph to see a larger version in a separate window.

Refer to the graph to answer each of the following questions. For part (A), use interval notation to report your answer. (If needed, you use U for the union symbol.)

(A) For what values of in (0,8) is concave down? (If the function is not concave down anywhere, enter "{}" without the quotation marks.)

(B) Find all values of in (0,8) is where has an inflection point, and list them (separated by commas) in the box below. (If there are no inflection points, enter -1000.)

Inflection Points:

You can earn partial credit on this problem.