
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
From 6 volunteers at the Shanghai World Expo, 4 people are to be selected to serve at the national pavilions of Germany, Japan, Italy, and Sweden within the Expo Park, with the requirement that each pavilion is assigned 1 person.

(1) If person A must go, how many different arrangement plans are there?

(2) If persons A and B cannot go to the Japan national pavilion, how many different arrangement plans are there?

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