Consider the following statements with reference to Swami Vivekananda.
1. Swami Vivekananda was the spiritual guru of Ramakrishna Paramahamsa.
2. Swami Vivekananda founded the Ramakrishna Mission at Belur in 1897.
3. Swami Vivekananda was originally known as as Narendranath Datta.
Which of the statements given above is/are correct?