The answer is
<span>¿Qué tal?
Por que means why
Cuanto means how much
and Cuando means when.
</span>
The answer is most likely Yendo
Answer: "Mirar la televisión". (watch the T.V)
It doesn't match with "cantar con un amigo" (sing with a friend) nor matches with "tocar la guitarra" which means play the guitar.
Sing with a friend and play the guitar are music-related themes, while watch the T.V isn't.
The correct conjugation if servir for Ella is Sirvó