The graph below shows the height of a kicked soccer ball f(x), in feet, depending on the distance from the kicker x, in feet: Graph of quadratic function f of x having x intercepts at ordered pairs 0, 0 and 30, 0. The vertex is at 15, 15. Part A: What do the x-intercepts and maximum value of the graph represent? What are the intervals where the function is increasing and decreasing, and what do they represent about the distance and height? Part B: What is an approximate average rate of change of the graph from x = 22 to x = 26, and what does this rate represent?