Need help with faucet

Faucet in the master bathroom has been making a weird noise lately and today it finally broke off completely. I was able to disconnect the hose from the black plastic part of the tubing but can't figure out a way to disconnect the hose itself from the middle plastic part that connects the cold and hot water hoses. Any help is appreciated.

Here are pictures of all the parts. http://imgur.com/a/K7Mr0