
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 on the number line, point A and point B are 12 units apart, point A is to the right of the origin at a distance of 22 units, and point B is to the left of point A. The number represented by point C is the opposite number of that represented by point B. A moving point P starts from A and moves towards the endpoint C at a speed of 1 unit per second. Let the moving time be $t$ seconds.  
(1) The number represented by point A is    , and the number represented by point C is    .  
(2) Express the distance between P and point A with an algebraic expression containing $t$: PA=    .  
(3) When point P moves to point B, point Q starts from point A and moves towards point C at a speed of 3 units per second. After reaching point C, Q immediately returns at the same speed and stops moving when it returns to point A.  
① During the movement of point Q, how many seconds after Q starts moving will it meet with point P?  
② During the movement of point Q from point A towards point C, can the distance between points P and Q be 3 units? If yes, request the number represented by point P at this time; if no, please explain the reason.

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