Give three examples of things that the government usually provides in mixed economies

Three examples of things that the government usually provides in mixed economies are:
1. the government take care of international trade and make all the laws that regulate it.
2. National transportation: the government ensure that all the regions in the economy are linked up with good transportation networks.
3. The government control the military and all that have to do with it.

Icould be wrong but i would say b.