
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 an opaque bag, there are four balls labeled with the numbers 1, 2, 3, and 4. Except for the labeled numbers, the balls are identical. Two balls are drawn from the bag simultaneously.
(1) List all the elementary events.
(2) Calculate the probability that the sum of the numbers labeled on the two drawn balls is 5.

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