Never make the claim that you have found a question that evolutionists cannot answer. And even if they cannot answer it that does not make the theory of evolution false. New functions have been observed to have evolved. That makes your objection that we don't know how they occurred moot. The fact is that life has developed new functions many times over. There may be many different answers to how life evolved new functions. The fact is that it has happened and we can prove that.Drew Smith,
The information problem of evolution is obvious. How did added function develop in life-forms that are highly coupled from a systems point of view. How improbable is probable? These are the questions that evolutionists can't answer and where their faith sets in.
Meanwhile you might start your research into answer here: