This experiment is over

I'm leaving this here as a reference to the experiment.

You can find the results here.

1. Choose the most understandable symbol for first aid

2. Choose the most understandable symbol for elevator

3. Choose the most understandable symbol for stairs

4. Choose the most understandable symbol for fire extinguisher

5. Choose the most understandable symbol for theater

6. Choose the most understandable symbol for tickets

I am with years of experience

Multi-talented? Choose whatever you have more experience with.