Answer:
the question states 'Is the plane going to arrive in Senegal?'
a possible answer may be yes the plane is going to arrive in Senegal. which is: Oui, l'avion va arriver au Sénégal.
or a negative, no the plane is not going to arrive in Senegal. which is: Non, l'avion ne va pas arriver au Sénégal.
if the question needs to be fixed gramatically, it should be: L'avion va-t-il atterrir au Sénégal ?
bonne journée :)
(have a great day)
hope I helped <2+1