Determine type of set

Question

Given complement to set $M$ is recursively enumerable and recursive set $R$. What will be the type of the subset of M, elements of which are in R ?

I think they will be also recursively enumerable, but I'm not quite sure about it.

Answer 1

the complement of $M := \Bbb N$ is recursively enumerable; $R := \Bbb N$ is recursive; good luck classifying the subsets of $\Bbb N$.