Q26-A. (i) There is a lot of green plant waste in your date farm. How will you convert this waste into a useful gaseous fuel? (4 marks) Q26-A (ii) Explain two historical developments in the field of Ocean thermal energy. (1 Marks) Q26-B. There are hydrogen and oxygen gas cylinders available in chemistry lab. Design and describe a system to generate electricity from these gases. (5 Marks) Q26-C. Based on renewable energy, design and describe a system to be used in summer for cooling purpose