
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
As Emily is riding her bicycle on a long straight road, she spots Emerson skating in the same direction $1/4$ mile in front of her. Unnoticed by Emerson, there is a stationary billboard $3/4$ mile ahead of him. Emily rides at a constant rate of $15$ miles per hour, and Emerson skates at a constant rate of $9$ miles per hour. Emily will lose sight of Emerson either when he skates past the billboard or when he is $1/2$ mile behind her. For how many minutes can Emily see Emerson?
A) 2.5 minutes
B) 5 minutes
C) 10 minutes
D) 15 minutes

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