Which of the following statement/s is/are CORRECT? The court in Mitchell Cotts Freight Zimbabwe (Pvt) Ltd v S&T Import and Export (Pvt) Ltd 1982 (2) SA 669 (Z), which dealt with the payment of a debt, held that:

1. The terms of the contract must be certain.
2. The contract will be void for vagueness if the parties nominate a third party to determine the purchase price in a contract of sale.
3. Where the language used is vague, indefinite or lacking in detail, the contract is void for vagueness.
4. Where the language used is vague, indefinite or lacking in detail, the contract remains valid if the parties had full contractual capacity at the time of conclusion of the contract.
5. The terms of the contract must always be in English, since it is the commonly accepted business language in South Africa.