Hello, I do not understand how to solve these questions. Would you please help with a solution for these questions.

Photos - 2JPG 0 X See all photos Add to Edit & Create v Share .. . Attempts 0 Keep the Highest 0 / 1 8. The interaction of individual choices Hilary has opened a new startup company in web design. Within the first month of business, the startup agrees to maintain an accounting firm's website in exchange for someone at the firm doing the startup's tax returns. Which of the following principles of economic interaction best describes this scenario? O Markets allocate goods effectively. O Trade can make everyone better off. When markets do not achieve efficiency, government intervention can improve overall welfare. O All costs are opportunity costs. Photos - 3JPG 0 X See all photos Add to Edit & Create " Share . . . Attempts 0 0 Keep the Highest 0 / 1 8. The interaction of individual choices Immediately after an ice storm brought down power lines throughout the region, hardware stores were sold out of batteries and flashlights. However, within a couple of days, special deliveries brought in extra batteries and flashlights, and everyone who wanted to buy a flashlight or batteries was able to do so. Which of the following principles of economic interaction best describes this scenario? When markets do not achieve efficiency, government intervention can improve overall welfare. O Markets allocate goods effectively. O All costs are opportunity costs O There are gains from trade