
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
Consider a tetrahedron $PQRS$ with sides $PQ=5.5$, $PR=3.5$, $QR=4$, $PS=4.2$, $QS=3.7$, and $RS=2.6$. Calculate the volume of tetrahedron $PQRS$.
A) 9.80
B) 10.54
C) 11.52
D) 12.43

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