
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
(2013•Hubei) A trainee in a shooting test fired 10 shots, hitting the following scores: 7, 8, 7, 9, 5, 4, 9, 10, 7, 4. Then  
(1) The average score is __________;  
(2) The standard deviation of the scores is __________.

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