
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
We are downloading a 1.5 MB file to our computer from the internet. During this process, the program continuously estimates the remaining time based on the average speed of the download so far. At one moment, we observe that exactly half of the file has already been downloaded, and at this moment, the program estimates that the remaining time is precisely 2 minutes. After this time, regardless of any $t$ time that passes (due to network congestion), the program still indicates that the remaining time to download the file is 2 minutes. Determine the size of the file that has already been downloaded as a function of $t$.

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