
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
The eccentricity of the ellipse $\frac {x^{2}}{4}$+y<sup>2</sup>\=1 is $\boxed{\text{answer}}$, and the length of the focal axis is $\boxed{\text{answer}}$.

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