
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 line $l_1$: $y = -\frac{3}{2}x + b$ is tangent to the parabola $x^2 = -\frac{16}{3}y$ at point P.  
(Ⅰ) Find the value of the real number $b$ and the coordinates of the tangent point P;  
(Ⅱ) If another line $l_2$ passes through the tangent point P and is tangent to the circle $C$: $(x+1)^2 + (y+2)^2 = 25$, find the equation of the line $l_2$.

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