What was the nobles place in the social hierarchy? what were the potential benefits of being a noble?

The nobility occupies the upper ranks of the medieval society. The nobles were not the royalty, as they sit between the royals and commoners. They still act in the service of the royalty in sort of military service, funding and supplies, while also providing work, land, and protection to the peasants. The benefits? They often have great wealth and social status, and have access to education which they need because they are expected to handle so much responsibilities. 

i feel the answer is 6.