2. Find each limit algebraically if it exists. If the limit does not exist, state the reason why it does not exist. (a) lim (r+ 1) (b) lim Va+1-2 r-+3 (c) lim +2 3. Suppose f() = 20, x 1 Find each limit algebraically if it exists. If the limit does not exist, state the reason why it does not exist. (a) lim f(x) 2 (b) lim f(z) (c) lim f (z)