
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 2023 Hainan Air Show ended in Boao on October 6th. Many special aerobatic teams from home and abroad presented wonderful performances. The heights of five aerobatic flights are recorded as follows: $+2.5$, $-1.2$, $+1.1$, $-1.5$, $+0.8$ (unit: kilometers).
1. Determine whether the plane is higher or lower than the starting position at the end. By how many kilometers is it higher or lower?
2. If the plane consumes 3.5 kilograms of fuel for every 1 kilometer of ascent on average, and 2 kilograms of fuel for every 1 kilometer of descent on average, how much fuel is consumed in these 5 aerobatic flights?

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