A) After watching the current richest person in the world and the 5 richest ones in 2020 (click the blue text for hyperlinks ), suppose if you were one of them as the richest people in the world, do you have any problem of scarcity?

B) Considering opportunity cost of attending college, whether the money paid on room and board should be included? Apply the marginal analysis (compare the marginal cost and marginal benefit): Why to go to college as your final decision (best choice)?

C)Jack and Jill would like to organize a birthday party for some third person. Suppose Jack is faster than Jill at both cooking and cleaning. Jill is going to help Jack, but he is not as good as Jack at both things. (Let's assume only 2 hours to plan the party). Think about it: Should Jack actually accept the offer Jill is giving you?

Links:

https://acrobat.adobe.com/id/urn:aaid:sc:VA6C2:fa0bc612-1d44-4b41-9713-9a8be427a250

https://youtu.be/6szj1L0j704

https://youtu.be/lnxPrjo8eMU