a coolant leak coming from the middle of the car. My low coolant light is on. on 1996 Buick Skylark

The car was not running when the leak started. I had my son crawl under the car to see where leak was coming from and he said there is 2 hoses and it is coming from the top hose, but cant determine where. I also have a issue where my car makes a knocking sound until it warms up.

Asked by for the 1996 Buick Skylark