For what purpose did the Egyptians depict the nobleman himself with his family

For what purpose did the Egyptians depict the nobleman himself with his family on the walls of the tombs, and why did they put figures of workers in the tomb?

The Egyptians were very sensitive about the afterlife. They believed that a person, dying, passes into another world, where he continues to exist. In this connection, this man needed everything he had during his lifetime: food, servants, etc. Thus, after death, the noblemen’s tomb was filled with all those necessary objects, including the figures of servants, which, according to the Egyptians, were supposed to serve their master in the next world.