I dont understand the process at all is there an easier way to comprehend?

How hot is the suns corona? (integrated science)

1. if you have a gas at 127 degrees c, what is it's absolute temperature (kelvin)? a. 200kb. 300kc. 400kd. 500k2. if you had a gas whose absolute temperature measured 45 k, what is that temperature in celsius? a. -228 cb. -300 cc. 125 cd. 112 c

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?