Question: Book 1, page 54

[riyaaaz]

In Book 1, page 54

ومن هذا الفَتَى الذي مَعَكَ؟
In this question Brother Asif picked up the word مَعَكَ
He said it is zarf and Mudaf Ilaihi.
I didn’t get this. I am confused.

My understanding is, مَعَكَ is (particle)مَعَ + (attached pronoun)كَ
So, when the pronoun is attached to Harf(particle), it is Jarun wa Majrurun.

How is this Zarf and Mudaf Ilaihi?

Can someone please explain me in as much as possible ass I am a beginner?

JazakAllah