Please answer (true) ( false) questions :
1- International trade composes approximately 25% of US GDP
2- Domestic US freight transportation expense has been declining in recent years
3- The role of safety stock is to offset uncertainty in inventory management
4- US citizen may support a country boycott if there is valid export business to be gained for this participation
5- After NAFTA, customs regulations are identical in Canada and US
6- SCOR is a tool for defining and measuring supply chain metrics