Sam is shopping for a TV on Amazon (cost R20 000), and he sees that they accept payment with Ethereum (R10 000 =0.96ETH ). Sam currently has 56ETH in his virtual wallet. a) Once he selects "pay with ethereum", explain in your own words, the processes that happen "behind the scenes" to enable him to actually pay for the computer using his ethereum. (7 marks) b) If there is a hard fork to Ethereum, which creates Ether-C, what impact will this have on Sam's cryptocurrency holdings