2. Steven buys an iPhone for $550 and gets a consumer surplus of $80. 3.1. What is Steven's willingness to pay? Show your calculations. 3.2. What is seller's willingness to sell if the costs of production per iPhone are $385? Show your calculations. 3.3. If Steven had bought the iPhone on sale for $490, what would his consumer surplus have been? Show your calculations. 3.4. If the price of an iPhone were $800, what would Steven's consumer surplus have been? Show your calculations.