Sam is shopping for a TV on Amazon (cost R20 000), and he sees that they accept payment with Ethereum (R10 000 = 0.96 ETH). Sam currently has 56 ETH in his virtual wallet.

Sams friend, Janet has the same TV for sale, and convinces Sam to purchase it from her instead of Amazon (for a price of 0.72 ETH). The TV is currently kept in a storage locker in Durban, which has a smart contract controlled, smart lock. Sam and Janet are well versed in cryptocurrency, and decide to programme the transaction into a smart contract. Discuss how the smart contract will be executed, to ensure the sale and delivery takes place. (10 marks)