Consider the Scala definition f : deff[x](xs:List[x]):List[x]= xs match case xilxs case y::ysy::f(ys) Consider the expression: f (List (1,2,3)) What is the result of evaluating the above expression? List(1,2,3) program fails to compile due to a type error List(3,2,1) List() List (1,2,3,1,2,3)