Etherchannel Speed

I have a question regarding Ether-channel.
ISP link is 100mbps.
If we create an EtherChannel by combining four ports, each with a speed of 100 Mbps, we can establish a logical link with a total speed of 400 Mbps.

  1. “If PC-A intends to establish a connection with the internet, what would be the achievable speed for the PC”.?
  2. “What would be the speed we can achieve while communicating on an Intranet?”