🚀 go-pugleaf

My name is Quinn Lawson.  I'm currently in grade 12 and my Maths teacher
has hit me with a relatively confusing question.  I gave it a go but with
no success.  See if you can help

A radar operator in a war zone must identify planes as either friendly of
hostile.  The probability that the radar operator does that correctly is
0.8.  Ninety percent of the planes on the war zone are truly friendly. 
When a plane is identified as hostile, a rocket is launched to shoot it
down.  Determine the probability that the rocket is launched.
'Friendly fire' occurs when a plane is shot down by their own forces.  The
probability that a rocket brings down a plane in the war zone is 0.6. 
Determine the probability that a truly friendly plane is shot down by
friendly fire.

If anyone can help it would be greatly appreciated!
If you can help, explain your answer and Email me at  lawso@ausemail.com.au