The function f is defined as f(x) = x + 8x + 15 (If an answer does not exist, enter DNE.) 2x- + 7x+ 3 (a) State the value(s) of x for which f is not continuous. (Enter your answers as a comma-separated list.) X (b) Evaluate lim f(x). X - -3 (c) State the equation(s) for the vertical asymptote(s) of the graph of y = f(x). (Enter your answers as a comma-separated list.) 'd) State the equation(s) for the horizontal asymptote(s) of the graph of y = f(x). Show the work that leads to your answer. (Enter your answers as a comma-separated list.)