
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 a mathematics test at Yang Village Elementary School's fourth grade, there are 15 questions. If Xiaoxi answered 11 questions correctly, Xiaofei answered 12 questions correctly, Xiaomei answered 13 questions correctly, and Xiaoyang answered 14 questions correctly, what is the minimum number of questions that all four of them answered correctly?

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