Benjamin is shopping for a computer on Amazon (cost R15 000), and he sees that they accept payment with bitcoin (R15 000 = 0.04 BTC). Benjamin currently has 1.3 BTC in his virtual wallet. a) Once he selects bitcoin payment, explain in your own words, the processes that happen behind the scenes (in the background) to ensure that the transaction is secure, and that he is able to pay for the computer using his bitcoin. (Note: no diagrams are required here, provide a written response only) (9 marks)