6. Consider the following statements: 1. Narasimha Saluva ended the Sangama dynasty and seized the throne for himself and started the Saluva dynasty. 2. Vira Narasimha deposed the last Saluva ruler and seized the throne for himself. 3. Vira Narasimha was succeeded by his younger brother, Krishnadeva Raya. 4. Krishnadeva Raya was succeeded by his half brother, Achyuta Raya. Which of the statements given above are correct?