
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
Mr. and Mrs. Lopez have three children. When they travel in their family van, two people sit in the front and three sit in the back. Either Mr. or Mrs. Lopez must sit in the driver's seat, and their eldest child must sit in the middle seat in the back. How many seating arrangements are possible?

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