
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
The distance between Station A and Station B is 800 kilometers, with the first 400 kilometers being flat, followed by 300 kilometers of uphill, and the remainder downhill. It is known that the speed ratio of the train on uphill, flat, and downhill roads is 3:4:5,  
(1) If the train's speed on flat roads is 80 kilometers per hour, how many more hours does it take for the train to travel from Station A to Station B than from Station B to Station A?  
(2) If the train is required to take the same amount of time for the round trip, what is the ratio of the train's speed on flat roads from Station A to Station B to that from Station B to Station A?

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