Can you please solve each part of the question with a thorough explanation so I understand? Thank you!

One can gain insight by manipulating the price elasticity of demand equation. With the information provided below, demonstrate what happens in the specific markets. a.) Suppose there is a technological change that allows manufacturers to make Android smartphones much more cheaply. In fact, the retail price falls by 15%, ceteris paribus. i) If the price elasticity of demand is -0.7, how much does the quantity demanded change? ii) Are the producers definitely better off or worse off? Explain (Hint: Critical Thinking) b.) In an alternative scenario, ceteris paribus, suppose there is a new tax on data usage. The cum-tax monthly bill increases by 25%. i) If the price elasticity of demand is -0.33, how much does the quantity demanded change? ii) Do the data plan providers earn more revenue or less revenue? Explain (Hint: Critical Thinking)