
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
$ABCD$ is a rectangle whose area is 20 square units. Points $E$ and $F$ are on $AD$ and $BC$, respectively, such that $AE = 4$ units and $BF = 3$ units. Find the area of trapezoid $EFBA$ in square units, where $E$ and $F$ are aligned horizontally.

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