You don't really need any books or CDs to help you with this stuff, Johan..They say that a picture is worth a thousand words.
The problem with questions like this, is that it's difficult to visualise the situation from the text.
Draw the face of an RMI, on the heading, with the two needles showing the bearings given.
It's easy from that, to draw a diagram showing the position of the beacons, in relation to the aircraft.
Once you have that, the answers become self evident.
The worst part of this question, was that you had to guess the three assumptions I made at the beginning, There wasn't really enough information in the question to work it out.
MJ