What is hā in yā ayyuhā al-kāfirūn?

Supplementary Practice 22: Comparative Rhetorical Study of Sūrat al-Kāfirūn and al-Naṣr

• A plural masculine subject pronoun
• A negative particle governing ayyu
• A preposition making al-kāfirūn genitive
• A particle of attention in the vocative construction