The graphs of f and g are given. Use them to evaluate each limit, if it exists. (If an answer does not exist, enter DNE.) (a) limx→2[f(x) + g(x)] (b) limx→0[f(x) − g(x)] (c) limx→−1[f(x)g(x)] (d) limx→3 f(x) g(x) (e) limx→2[x2 f(x)] (f) f(−1) + limx→−1 g(x)