12. (2 Points)Refer to the graph of the rational function below and complete the statements that follow. Vertical asymptote: x=-3 N Horizontal asymptote: y =0 x Vertical asymptote: x=1 -3 a. As x- -3, f(x) - As x - -3 f(x) - c. As x- 1 , f(x) - d. As x - 1 , f(x) - e. As x - -co, f(x) f. As x- oo, f(x)