$\"\"$

Observe the graph:

First graph on the left indicates a solution set from $\"\"$ to $\"\"$ .

The solution set is $\"\"$ .

Second graph on the right indicates a solution set of all numbers less than or equal to $\"\"$ or greater than or equal to $\"\"$ .

The solution set is $\"\"$ .

$\"\"$

Graphs the solution sets are $\"\"$ and $\"\"$ .