3TG minerals (tungsten, tantalum, tin, and gold) are used widely in the electronics industry. Unfortunately, 3TG minerals are often sourced from volatile parts of the globe like the Democratic Republic of the Congo. In an effort to reduce conflict, the US government bans the importation of 3TG minerals from the DRC and nearby countries. Meanwhile, the median household income increases by 15 percent. What will happen in the market for smartphones? Assume that smartphones are a normal good