
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
Given that the angle between vectors $\overset{→}{a}$ and $\overset{→}{b}$ is ${60}^{∘}$, $|\overset{→}{a} − \overset{→}{b}| = \sqrt{3}$, and $\overset{→}{b} \cdot (\overset{→}{a} − \overset{→}{b}) = 0$, find $|\overset{→}{a}| = $ \_\_\_\_\_\_\_\_\_\_.

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