
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
In $\triangle ABC$, the sides $a$, $b$, and $c$ correspond to angles $A$, $B$, and $C$ respectively. Given vectors $\overrightarrow{m}=(2b-c,a)$ and $\overrightarrow{n}=(\cos C,\cos A)$, and $\overrightarrow{m}$ is parallel to $\overrightarrow{n}$.

1. Find the measure of angle $A$.
2. If $\overrightarrow{AB}\cdot \overrightarrow{AC}=4$, find the minimum value of side $a$.

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