(4 points) Answer the following questions for the function defined on the interval [-14.71, 3.43]. Remember that you can enter pi for π as part of your answer. a.) f(x) is concave down on the region(s) b.) A global minimum for this function occurs at 0 f(x)=sin² sin² (=) 2 c.) A local maximum for this function which is not a global maximum occurs at d.) The function is increasing on the region(s) Note: In some cases, you may need to give a comma-separated list of intervals, and intervals should be given in interval notation.