Ineed with these limit problems. i'm having difficulty reading the graphs to find the limits. can someone me ?

There is a magnifying glass icon on the graph.  If you'd click on that, the graph will be presented in a larger, more readable format.

I agree with your "DNE" response to #1.  There's no limit as x approaches 2 from the left, as the graph continues to zigzag up and down;  For a limit to exist, the function value must approach one unique limit.

The answer of this question is 672 .