Analyze the polynomial function f(x) = 7x-7x-7x+21. Answer parts (a) through (h). (a) Determine the end behavior of the graph of the function. 1 3 The graph of f behaves like y = 7x for large values of |x|. (b) Find the x- and y-intercepts of the graph of the function. The x-intercept(s) is/are (Simplify your answer. Type an integer or a fraction. Use a comma to separate answers as needed. Type each answe only once.)