According to full preterism, who is 'the dragon' and what are the differences between 'the dragon' and 'the beast'?

In some passages from the Bible there exists sentences such as: Revelation 12:9 > The great dragon was hurled down—that ancient serpent called the devil, or Satan, who leads the whole world astray. He was hurled to the earth, and his angels with him. and Revelation 13:4 > People worshiped the dragon because he had given authority to the beast, and they also worshiped the beast and asked, “Who is like the beast? Who can wage war against it?" Since I am assuming that 'Satan', 'the beast', etc are the same entity then Who is 'the dragon' and what are the differences between 'the dragon' and 'the beast'?