*****Code using SML**** please answer this question and give me a copyable code and output please in SML, thank you

1. (20 points) Define a function single: 'a list list - 'a list which takes in input a list of lists and gives back the list consisting of all the elements, in the same order in which they appear in the argument. Examples: single single [ single [1,2,(1,3,41,01, 5), 16,711- [1,2,1,3,4,5,6,7 single [["a"),["b","c"11-["a", "b","c