Consider the following statements relating to the use of the place-value system in India: 1. The earliest epigraphic use of the place-value system in India is found in the Mankani plates from Gujarat (AD 595 - 596). 2. In the ninth century, place-values become general in inscriptions all over India. 3. The place-values have been found in Sanskrit inscriptions in South-east Asia as early as the seventh century. Which of the statements given above are correct?