
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 50-foot tree is casting a 25-foot shadow at the same time when Mark is casting a 20-inch shadow. How tall is Mark, in inches, if the same ratio of the height of an object to the length of its shadow applies?

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