Gertrude tells Hamlet the wine was poisoned and dies. Laertes explains to Hamlet that Gertrude had been poisoned and that he and himself are too. Laertes also warns Hamlet it is claudius's fault.
I can no more. The king, the king’s to blame.
No, no, the drink, the drink! —O my dear Hamlet! The drink, the drink! I am poisoned.
Hamlet wounds Claudius and forces him to drink the wine, Claudius dies. Laertes asks for forgiveness from Hamlet as he forgives him, Laertes dies.
Exchange forgiveness with me, noble Hamlet. Mine and my father’s death come not upon thee, Nor thine on me.
Laertes wanted to avenge his father's death so he worked with Claudius to get revenge on Hamlet.
Hamlet tells Horatio to tell people his story before he dies. Horatio feels he has no reason to live and picks up the cup, but Hamlet convinces him not to drink it. Hamlet says that young Fortinbras should be the next. Hamlet dies.
Deaths explained: Gertrude: Accidentally drank poison. Laertes: stabbed by Hamlet with his own poison tipped sword. Claudius: stabbed by Hamlet and forced to drink poison Hamlet: stabbed from poison tipped sword by Laertes.
Motives: Poisoned Wine: The cup was poisoned by Claudius and was meant for Hamlet Poison tipped sword: Laertes sword was poison tipped because he wanted to kill Hamlet as revenge for Hamlet killing his father. Hamlet killed Claudius because he had caused this incident and had killed Hamlet's father.