What happens to the grammatical cases when a muḍāf noun joins the first-person singular yāʾ (yāʾ al-mutakallim), ـي?

Using Attached Pronouns as the Muḍāf Ilayh and Their Spelling Rules

• The final case ending of the muḍāf changes to kasrah, and the written form is the same in all three cases
• The final case ending of the muḍāf always remains ḍammah
• The muḍāf ilayh becomes indefinite