
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
What is the area of the quadrilateral with vertices given as $(2,1)$, $(5,3)$, $(7,1)$, and $(4,6)$?
A) 5.5   B) 7.5   C) 8.5   D) 10   E) 12.5

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