Revenue recognition sale of goods

In each of the following situations, state at which date, if any, revenue will be recognised.

1. A contract for the sale of goods is entered into on 1 May 2022. The goods are delivered on 15 May 2022. The buyer pays for the goods on 30 May 2022. The contract contains a clause that entitles the buyer to rescind the purchase at any time. This is in addition to normal warranty conditions.
2. A contract for the sale of goods is entered into on 1 May 2022. The goods are delivered on 15 May 2022. The buyer pays for the goods on 30 May 2022. The contract contains a clause that entitles the buyer to return the goods up until 30 June 2022 if the goods do not perform according to their specification.
3. A contract for the sale of goods is entered into on 1 May 2022. The goods are delivered on 15 May 2022. The contract contains a clause that states that the buyer shall pay only for those goods that it sells to a third party for the period ended 31 August 2022. Any goods not sold to a third party by that date will be returned to the seller.
4. Retail goods are sold with normal provisions allowing the customer to return the goods if the goods do not perform satisfactorily. The goods are invoiced on 1 May 2022 and the customer pays cash for them on that date.