можно ли так построить предложение в англ. языке? hi's a rock musician and he's thirty five.

He's thirty five and he's a rock musician. Так более логично и складно.
Или же:
He's a rock musician and he's thirty five years old.
He's a rock musician thirty five years old. - самое лаконичное.
Вариант:
He's thirty five years old rock musician.