
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
To understand the fuel consumption of a certain brand of sedan, a fuel consumption test was conducted after filling the tank, and the data in the table was obtained:

| Distance Traveled by the Sedan $s$ (km) | 0 | 100 | 200 | 300 | 400 | $\ldots$ |
|---------------------------------------|---|-----|-----|-----|-----|---------|
| Remaining Fuel in the Tank $Q$ (L)    | 50| 42  | 34  | 26  | 18  | $\ldots$ |

$(1)$ The capacity of the sedan's fuel tank is ______ $L$;  
$(2)$ Based on the data in the table, write the expression for the remaining fuel in the tank $Q$ (in liters) as a function of the distance traveled by the sedan $s$ (in km) ______.

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