The graph of f(x) is shown (see figure). f(x) = 4 x2 x2+5 (a) Find the following limit. L = limx→∞ f(x) = (b) Determine x1 and x2 in terms of ε. x1 = x2 = (c) Determine M, where M > 0, such that |f(x)−L| < ε for x > M. M = (d) Determine N, where N < 0, such that |f(x)−L| < ε for x < N. N =