هَلْ = Do you [for yes/no]

Choose the word for "Where" from the following:

What does أَيْنَ القَلَمُ؟ mean?

كَيْفَ تَذْهَبُ إِلَى المَدْرَسَةِ؟ = How do you go to work?

What does مَا هَذَا؟ mean?

أَيْنَ = How