will the missile hit the plane before it reaches 9000m due west?

Question

A plane at a height of 5000m is travelling at a constant speed of 300ms. A heat-seeking missile is fired at a plane when it is 5000m due east of an airbase! If the missile's speed is 350ms, will the missile hit the plane before it reaches 9000m due west?

Answer 1

???????? yu fire missel from ground ????? or from nuther plane ????

???????? maebee plane at same hite as target ???????

?????? & wot bout speed av launch plane?????