What are the differences between cyberwarfare, cyberterrorism, cyber espionage, and cybercrime?

What are the differences between cyberwarfare, cyberterrorism, cyber espionage, and cybercrime?
Should the private sector have a heavier role in cybersecurity?
Read through the information on this data summary sheet (https://www.start.umd.edu/pubs/Overview%20of%20Terrorist%20Attacks%20in%20the%20US%201970-2013_1.pdf
(Links to an external site.)
) . What aspects of the trends from the Global Terrorism Database (described here) make intelligence and counterterrorism activities difficult? Why?

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