x-1 if x<2 if 2≤x≤7. if x>7 Let f(x) = 1 x+1 a. Find lim f(x). Xx-2 b. Find lim f(x). X-7 Select the correct choice and, if necessary, fill in the answer box to complete your choice. A. lim = X-2 OB. The limit is not -[infinity]o or [infinity]o and does not exist. Select the correct choice and, if necessary, fill in the answer box to complete your choice. OA. lim = X-7 B. The limit is not co or oo and does not exist