Problem 5. (1 point) 9 Let f(x) = x+4' if x -4 Calculate the following limits. If the limit doesn't exist but it makes sense to call it co enter Infinity , for -co enter -Infinity ; in other cases where the limit does not exist enter DNE . lim f(x) = x- -47 lim f(x) = x- -4+ lim f(x) = x--4