s5 users - need some info

[Android Central Question]

I'm thinking of buying a samsung galaxy s5 but need to check a few things before i do:
1) is this phone 4g
2) can it do mobile hotspot tethering
3) if it can do hotspot, what type of encryption does it use?
4) can it install and use the app 'ip webcam'
thanks fir any advice.