
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
Given that the values of a certain immune response protein M in the volunteers follow a normal distribution N(15, σ^2), and the number of volunteers with X in the interval (10,20) accounts for 19/25 of the total number of volunteers, calculate the number of volunteers among them whose value of immune response protein M is not less than 20.

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