3.) Your client wants to separate a 5-components hydrocarbon mixture (A,B,C,D, and E) in which C and D are light and heavy key components respectively. The relative volatility of the key components closes to 1. Describe with the aid of labelled diagram two possible techniques that can be used to achieve the separation. What is the economic implication of separating such mixture with inappropriate separation technique? 17.5mks 4.) What are the benefits of controlling dust emission in industry? Describe various methods that may be used to minimise dust emission from industries. Which of this method will you recommend and give reasons for your preferred choice. Write short note on wet scrubber and how its efficiency can be improved. 17.5mks