
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 an ellipse M with its center at the origin of coordinates and its foci on the x-axis. If one of the vertices of M is exactly the focus of the parabola $y^2=8x$, and the eccentricity of M is $e= \frac {1}{2}$. A line $l$ that is not perpendicular to the coordinate axes is drawn through the right focus F of M, intersecting M at points A and B.  
(1) Find the standard equation of ellipse M;  
(2) Let point N $(t,0)$ be a moving point, and $( \overrightarrow {NA}+ \overrightarrow {NB})$ is perpendicular to $\overrightarrow {AB}$, find the range of the real number t.

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