Explain why a Smart Contract execution has a cost. 2. In a few years, it's possible that we will use an Ethereum Smart Contract to seal the union of two people. Imagine what other current features or industries we could associate with this contract and explain the implementation process 3. The company you work for is considering introducing blockchain technology to support a collaborative on-demand energy supply organization. You are asked to present opportunities and risks associated to this strategy. First of all, explain why a Blockchain can be seen as a missing element of the Internet communication stack to support a distributed collaborative organization, managing stakeholders'' interactions. 4. Explain how a Token-based solution (Tokenization) could be introduced in the real-estate market 5. Explain the deficiencies of Bitcoin and how these limitations can be minimized 6. Why is the difficulty of the proof of work in Bitcoin set to ten minutes? What would go wrong if it was changed to 12 seconds? 7. When launching a new altcoin, what advantages and disadvantages would there be to using a new block chain with pre-mining for initial allocation, compared with a two-way pegged sidechain (i.e., a sidechain where assets can be transferred to and from another chain at a fixed exchange rate)? Assessment criteria This assignment assesses analytical skills and the practical application of content from the course. The mark for the Assessed Group Presentations comprises of:  40% for the depth of analysis and integrated application of relevant concepts from the course  30% for clearly articulated and actionable recommendations, and a justified plan for implementation  30% for the use of engagement, persuasion and communication skills, including clarity, structure and conciseness of the solutions  How should data sources be acknowledged? All sources of data used in the study must be listed on a reference slide.