2 Given the function f(x) = , where k is a constant 2x2 + ka a. For what value(s) of k will the function have a vertical asymptote at x = -7 ? Explain how you obtained your answer(s). b. For what value(s) of k will the function have a horizontal asymptote at y = 0 ? Explain how you obtained your answer(s). c. For what value(s) of k will the function have a horizontal tangent line when x = 3 ? Explain how you obtained your answer(s)