
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Proposition $p$: The domain of the function $y= \sqrt {ax^{2}+ax+1}$ is $\mathbb{R}$;  
Proposition $q$: The range of $y=\log_{ \frac {1}{2}}(ax^{2}+4x+2)$ is $\mathbb{R}$. If $p \land q$ is true, find the range of values for $a$.

Present the answer in LaTex format: \boxed{Your answer}
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