
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 project consists of four processes: A, B, C, and D, which require 2, 5, x, and 4 days to complete, respectively. The sequence and relationship of the four processes are as follows: A and B can start at the same time; C can start after A is completed; D can start after both B and C are completed. If the total duration of the project is 9 days, the maximum number of days required to complete process C, denoted as x, is ___.

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