Consider the following statements about colonial economy of Vietnam (Indo-China): 1. The colonial economy in Vietnam was primarily based on rice cultivation and rubber plantations. 2. All the rubber plantations in Vietnam were owned and controlled by a small Vietnamese elite. 3. Indentured Vietnamese labour was widely used in the rubber plantations. 4. Indentured labourers worked on the basis of contracts that did not specify any rights of labourers but gave immense power to the employers. Which of the statements given above is/are correct?