9. Two countries: US and Mexico. Two goods: Airplane and car. A US worker's MPL is 20 times higher than a Mexican worker in making an airplane. A US worker's MPL is 5 times higher than a Mexican worker in making a car. Which country has absolute advantage in making cars and why

The US has absolute advantage in making cars.  An additional worker makes 5 times higher cars than a Mexican worker.

Explanation:

The US has the absolute advantage than Mexico in making both products since its Marginal Product of Labor (MPL) (i.e. the number cars that an additional worker produces) is higher.  The US also enjoys absolute advantage because it incurs less cost in making car (or even airplane) than does Mexico in making either car (or even airplane).  One can then conclude that the US has the absolute advantage in the making of cars.

The conduct code or a manual basically has to define the ways in which people must act in the company.

Explanation:

Every company has a set of standards and how the work culture exists in their company.

This is often a direct inference of the practices of their company in the market and what their place is according to it.

It also depends on what industry the company is a part of.

Thus, the manual makes sure there is a directive way of understanding the rules of conduct of every worker within a company and even for the managers and executive there exists this way of understanding what it is about.