Can Anybody answer this

Ajeweler designing a pin has decided to use five stones chosen from diamonds, rubies, and emeralds. in how many ways can the stones be selected?

You install teamviewer on your workstation at home so that you can ac ess it when on the road. how can you be assured that unknown users cant access your computer through team viewer?

Based on your knowledge of a good network, describe what you think is a perfect network would be. what kind of information and resources could users share on this network. what would the network administrator do? what kind of communication would be used?