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?