You could add some diagrams,citations and references and you could explain the questions detailedly.Thanks!

Q1 (a) Explain how greater advertising by a firm may reduce the price elasticity of demand for its product. (25 marks) (b) What factors determine the cross-price elasticity of demand? (25 marks) (c) Explain why firms will always maximise revenue by charging a price where demand is unitary elastic. (25 marks) (d) Explain why firms will always maximise profit by charging a price where demand is elastic. (25 marks) (100 marks)