The English should be "My friend and I", not "I and my friend".
Colloquial English = "Me and my friend" in that specific order
Formal English = "My friend and I" in that specific order
"I and my friend" in that order are not correct in either colloquial or formal English.
I said "saya dan temanku" but it marked me as wrong....
I think that is because you cannot use the formal "saya" and informal "-ku" in the same sentence
Why is Aku not suitable in place of Saya?