Use the graph of y = f(x) and the given c-value to find the following, whenever they exist. (If the limit is infinite, enter 'oo' or '-co', as appropriate. If the limit does not otherwise exist, enter DNE.) C = -4 (a) (b) (c) 3- -9 -6 -3 y = f(x) -3- lim f(x) x-c lim f(x) x-c+ lim f(x) x-c (d) f(c) x