Change Material of each element in an array.

I have an array of meshes with single material if i want to asssign the material individually for each object hgow can i do it?

As seen in the pic i can individually change the transform but i wiopuld like to have the same for material or have individual material for each element. How can i achieve that ?

inside the blueprint

I attaached the Bp didnt know where and how to do it.