You really are in serious trouble if you do not even know where to start with these problems.
For 11a, what is the approximate y-value when x is near -2 but x is NOT -2. Look a little to the left of -2 and a little to the right of -2 and determine what the y-value is approaching. If you get the same answer then the answer to 11a is that common answer otherwise the limit does not exist.
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