Direct sums and injective, projective, flat

Let $R$ be a commutative ring (with unity) and let $M_{1}$ and $M_{2}$ be two $R$ -modules. Prove that $M_{1} \oplus M_{2}$ is:

Hints

You'll likely want to exploit the isomorphism $M_{1} \oplus M_{2} ≃ M_{1} \times M_{2}$
Also recall that tensor product commutes with direct sum
You might also want to note that for a pair of morphisms $ϕ : N_{1} \to P_{1}$ and $ψ : N_{2} \to P_{2}$ , there is an isomorphism $\ker (ϕ \oplus ψ) ≃ \ker (ϕ) \oplus \ker (ψ)$