
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
Eight different numbers have an average of $7$. The average of the first five numbers is $6$, and the average of the last five numbers is $9$. If the middle number is part of both the first and last five numbers, find this middle number.
A) 8.5  
B) 9   
C) 9.5  
D) 10

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