You have explained about zero knowledge protocol in good words but according to the requirement you should also have to give some of the important points related to your opinion about zero knowledge protocol but unfortunately you missed it and after that you have also explain in a good way that what is ZK-SNARK protocol and you have briefly talk about its working as well as you have also explain your opinion that could it be implemented on steem or not?

You have made good efforts to reply and to respond in all questions and given good answers but there were some questions which were confusing and there were some questions in which there was requirement to go into more depth so for the next time I expect more good content from you I wish you good luck and success in engagement challenge season 12 week 6.