Sink Pipe Broken

As you can see in the attached image, the pipe underneath one side of our kitchen sink is not right (understatement of the day). I am a noob (as in never did any repairs). So please help me determine how to fix this. What do I need to buy? What tools? And any other tips.

Thank you so much.

(Oh I am trying to fix two other major plumbing issues in our house. If you'd like to help me go from noob to :smartass: in a day, please click on my name and help with these other two repairs. Thanks!!)