
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 bag, there are 4 red balls and 3 black balls. If 4 balls are drawn from the bag, where drawing 1 red ball scores 1 point and drawing 1 black ball scores 3 points, let the score be a random variable $\xi$. Then, $P(\xi \leqslant 7)=$ \_\_\_\_\_\_.

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