Choose the correct verb  form
Dmitry ahd Omar have deen to Astana.
e)They stayed \ have stayed in Astana since October.
f)They know \ have known each other for 5 years
g)When did they go\ have they gone to Astana?

They have stayed in Astana since OctoberThey have kown each other for 5 yearsWhen did they go to Astana?