Question I-2: Explanatory answer questions (53=15 marks) i. In a gasifier, how many thermal zones may exist? List the name of each zone, indicate the operating temperature range and the major function of each zone. ii. The entire gasification process is generally classified into how many sections? Explain the major steps (operations, feeds, products etc) of each sections. iii. There are how many categories of gasifier designs available? Brielly cxplain how (operating principles) each of these gasifiers works? iv, List the major parameters affecting the gasification process performances. v. What are the major considerations for design of a biomass gasifier