please follow instructions and provide sample code. thanks

Write a Python function that does the following: 1. Its name is concatenate 2. It takes a list of strings as argument: words 3. It returns a string with all items in words concatenated and separated by spaces 4. Use a while loop (define an index before the loop, use index in the while condition, change the index inside the loop) - the last word in the resulting string is not followed by space Name the program concatenate. py. Make sure that gradescope gives you the points for passing the test cases