Passage: AH Velorum is a Cepheid variable located less than a degree to the northeast of Gamma. A yellow-white supergiant of spectral type F7Ib-II, it pulsates between magnitudes 5.5 and 5.89 over 4.2 days. Also lying close to Gamma, V Velorum is a Cepheid of spectral type F6-F9II ranging from magnitude 7.2 to 7.9 over 4.4 days. AI Velorum is located 2.8 degrees north-northeast of Gamma, a Delta Scuti variable of spectral type A2p-F2pIV/V that ranges between magniudes 6.15 and 6.76 in around 2.7 hours.
How many days difference is there between the F7Ib-II and the F6-F9II? How many points difference between the high and low is the range of magnitudes of the Al Velorum? How many points difference is there in the magnitude of the spectral type F7Ib-II? How many points is the difference of magnitude of the F6-F9II? Which has a higher magnitude, AH Velorum or V Velorum? Which spectral type has the highest magnitude,F7Ib-II or F6-F9II?