
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 Cartesian coordinate system on a plane, where $O$ is the origin, $A(-3,-4)$, and $B(5,-12)$.

(1) Find the coordinates of $\overrightarrow{AB}$ and $|\overrightarrow{AB}|$;

(2) Find the dot product of $\overrightarrow{OA}$ and $\overrightarrow{OB}$.

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