put the verbs in brackets into the present simple, the

put the verbs in brackets into the present simple, the present continuous or the future simple
jack: are you coming to the concert on Saturday?
peter: no, I ... (be) in London then.
jack: really? why ... (you/go) there?
peter: I ... (visit) my sister. It's her birthday at the weekend and we ... (go shopping) for a present.
jack: ... (you/give) me a ring before you ... (leave)? there are a few things I'd like you to buy me while you ... (be) there.
peter: sure. no problem. I ... (call) you on Friday.