This was astrolabe; an instrument to predict the position of the stars, that could also be used to predict t one's position. The compass was invented in China.
Property rights are the legal rights of ownership on which others are not allowed to infringe, without paying compensation. Hope I could help!
C. Somalia
Sorry if it’s wrong
In a prisoner's dilemma, the type of behavior that provides the most benefit for each individual is to cooperate.
If the prisoners cooperate, it means that the police won't have enough proof against these criminals given that they will give the same account of what actually happened. Instead of remaining silent, confessing, or betraying each other, the wisest decision for them is to cooperate and thus reduce their punishment.