I think the RBI example was stupid. It explained the basics of the RBI and the beacon and how the needle points to the beacon blah blah blah... Then you done the example and applied instrument theory and the example was wrong. Forget everything that was just explained to you in the introduction. The RBI is no longer an RBI it's a simple needle to be overlayed over the beacon which then points to the aircraft.
That's how I read the question but I got a PFO. 4k TT majority on 73.