5. Astronauts in space have just encountered three unknown stars and assigned them temporary names. Their absolute magnitudes are recorded. 5:- MW CherylXI 0.4 Roccolus-III , 1.8 Bi'idusM 3.2 a) How much brighter, in absolute terms, is the brightest of these three stars than the i) second brightest? ii) least bright? b) Assuming that these stars have the same apparent brightness, rank them in order of distance away from the astronaut looking at them. [5]