Choose the correct alternative.

Ed: Are you revising / Are you going to revise for the biology test tonight?

Anya: Not tonight! My parents and I are going / will go to a concert. My sister and her school orchestra will play / are playing in the Royal Albert Hall. We're all very excited. I think it's going to / 'll be amazing

Ed: Awesome!

Anya: Do you want to come, too? We have an extra ticket.

Ed: Maybe but I'll / 'm going to have to ask my parents first.

Anya: We're leaving / will leave at about 5.30 p.m. We can take you with us. I'm sure we "'re having / 'll have a lot of fun! Great! I'm going to / 'll call my mum now.