
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
A train from Shanghai to Wenzhou has a total of 6 stops, including the starting point and the destination, which are sequentially named A, B, C, D, E, F. Xiao Zhang took this train from Shanghai to Wenzhou. When the train left Shanghai, Xiao Zhang found that there were 19 passengers in his carriage, including himself, all of whom Xiao Zhang knew. Some of them were from Zhejiang, and the others were from Shanghai. Along the way, Xiao Zhang observed the following situations: ① Except for the terminal station, at each station, when the train arrived, the number of Zhejiang people in this carriage was the same as the number of passengers getting off, and no new passengers entered this carriage during this trip; ② When the train left station B, there were 12 passengers in the carriage; when the train left station D, there were still 7 passengers in this carriage; the passengers getting off at station F, including Xiao Zhang, totaled 5 people.  
(1) How many people from Zhejiang and how many people from Shanghai were there in the carriage when the train left Shanghai?  
(2) How many people from Zhejiang and how many people from Shanghai were there during the journeys from B to C, C to D, and D to E, respectively?

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