
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 the Cartesian coordinate system xOy, points A(-1, -2), B(2, 3), and C(-2, -1) are given.  
(Ⅰ) Find the dot product of $$\overrightarrow {AB}$$ and $$\overrightarrow {AC}$$;  
(Ⅱ) If the real number t satisfies the condition that the dot product of ($$\overrightarrow {AB}$$ - t$$\overrightarrow {OC}$$) and $$\overrightarrow {OB}$$ equals 0, find the value of t.

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