For Exercises 21 and 22, consider the function f given by f( x ) = 1 Jx - 2, for x = 3, (x - 1, for x > 3. YA 3 45 X If a limit does not exist, state that fact. 21. Find (a) lim_f(x); (b) lim . f(x); (c) lim, f(x). * + -1 *+-1 22. Find (a) lim_f(x); (b) lim, f(x); (c) lim f(x)