Can somebody please help me with these few questions?

Jamal's computer is able to connect to the Wi-Fi signal, but there is no Internet access. Which device do you think might be causing the problem and why?

Felicia's Wi-Fi connection to her phone is extremely slow. However, her computer that is wired directly to the modem works really well. Which device do you think might be causing the problem and why?

Credence would like to set up a wireless, DSL network for his home. He would like to keep his landline working while he is online as well. Explain how he should go about setting up this network. Include all of the devices and cables that he will need.


Thank you so so much!!!!!!