2. For each of the functions below, use your graphing calculator to draw a graph of the function and then estimate the x-coordinates of its inflection points. List all estimated points of inflection, all intervals where the function is concave up, and all the intervals where the function is concave down. You don't need to show your graphs, and of course your estimates don't have to be perfect. A. f(x = xex B. f(x = tanx, on the domain -