Classify each planet as an inner planet or an outer planet. planet a has 67 moons, and major parts of its atmosphere are hydrogen and helium. planet b has rings but not much atmosphere. planet c has no moons but has high volcanic activity known as the red planet, planet d has high amounts of carbon dioxide in its atmosphere and has two moons. planet e has a thin layer of atmosphere but no moons due to the effects of the sun’s gravity. planet f has 27 moons, and its atmosphere is mostly composed of hydrogen, helium, and methane.