Dealing with interrumptions

Which one is used in "restart the conversation"?

• Just a minute

• You were saying?

What's the meaning of "Can you hold on a second?"

• Quieres esperar un segundo?

• Deseas esperar un minuto?

• Puedes esperar un segundo?

• Podrias esperar un segundo?

-As Grace told you, my son entered a University but outstanding...

_ (A new phone call comes in))

Are you okay with restarting a conversation with the expression "Can you hold on a second?"

• Yes

• No

Why?

Justify your previous answer

Why do you agree? o Why don't you agree?

When I say "Could you shut up for a minute?

Is it a positive or negative way to interrupt a conversation?

Why? Justify your answer.