Reconstruct and explain Aquinas’ work on essence, demonstrating the distinction

Reconstruct and explain Aquinas’ work on essence, demonstrating the distinction between essence and existence in all beings except for God. In your paper, (1) reconstruct and explain Aquinas’ work on the essence of composite substances, clearly explaining what belongs to such an essence and why, (2) reconstruct and explain step-by-step Aquinas’ argument for the distinction between essence and existence. Primary texts: Aquinas’ On Being and Essence, ch. 2 and ch. 4.