4) The graph of the rational function f has vertical asymptotes at x = 1 and x = -3, and horizontal asymptote at y = -3. Its graph also has an x-intercept at (-1, 0). The equation for f (x) has one of the five forms shown below. a) Choose the appropriate form for f (x) y = f(x) 8 A. f (x) =- B. f(x) = a(x-b) x-C C. f (x) =- a (x-b) (x-c) (-2, 1) B 6 4 2 2 8 D. f (x) = 7 a(x-b) (x-c) (x-d) E. f (x) = a(x-b)(x-c) (x-d)(x-e) 6 8 b) Determine the equation of the function f from a), given that its graph passes through the point (-2, 1)