
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 the parabola $E: y^2 = 2px$ ($p > 0$) with focus $F$, and a point $(3, m)$ on $E$ is 4 units away from the focus $F$.  
(Ⅰ) Find the equation of the parabola $E$;  
(Ⅱ) Draw a line $l$ through $F$ intersecting the parabola $E$ at points $A$ and $B$. If the y-coordinate of the midpoint of line segment $AB$ is -1, find the equation of line $l$.

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