
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
A bag contains 5 white balls and 3 red balls. If 3 balls are randomly drawn from the bag, the random variable corresponds to the following option __________ (fill in the number).  
① The number of balls drawn; ② The number of white balls drawn; ③ The total number of white and red balls drawn; ④ The total number of balls in the bag.

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