Dave and Stephanie are lost in the jungle, where the only things to consume are mangoes and fish. Dave can gather more mangoes per hour and can also catch more fish per hour compared to Stephanie. Therefore: Group of answer choices: 1. Dave should specialize in the activity for which she has an absolute advantage. 2. Stephanie should specialize in the activity for which she has a comparative advantage. 3. there are no gains to specialization and trade for Dave. 4. there are no gains to specialization and trade for Stephanie.