Forming questions using "أي " " which"

Examples:

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* أيُّ الألوانِ تُفَضِّل ؟

which colors do you prfere?

Ayou al-alwani tofaddel ?

* أيُّ كتابٍ عِندَك ؟

which book do you have?

Ayou ketaben endak?

* بِأيِّ شيءٍ تَكْتُب ؟

with which thing do you write?

bi-ayi shay'en taktoub ?