What is the nature of yāʾ in «قُرَيْشٍ»?

Al-Fīl and Quraysh: Applied Iẓhār, Ikhfāʾ, Idghām, Madd and Waqf

• Madd yāʾ preceded by kasrah
• The yāʾ is doubled
• It is a madd wāw
• Līn yāʾ preceded by fatḥah