Certainly! Here’s a step-by-step answer for **Question 1** from the discussion: --- ## Step 1: Choose a Good or Service & Explain a Change in Demand or Supply **Good Chosen:** Gasoline **Situation:** Suppose the price of crude oil (a key input for gasoline) suddenly increases. **Explanation:** An increase in the price of crude oil raises the cost of producing gasoline. As a result, gasoline suppliers may reduce the amount of gasoline they are willing or able to supply at each price, leading to a decrease in the supply of gasoline. --- ## Step 2: Speculate on What Might Change the Demand or Supply **Speculation:** If new technology is developed that makes electric cars more affordable and efficient, many consumers might switch from gasoline cars to electric cars. **Explanation:** This change would decrease the demand for gasoline because fewer people would need to buy it. This shift in consumer preference would cause the demand curve for gasoline to shift leftward. --- ## Final Answer A rise in crude oil prices decreases the supply of gasoline, as it becomes more expensive to produce. In contrast, the adoption of electric cars would decrease the demand for gasoline, as fewer consumers would need it. --- Let me know if you need answers to the other questions!