language: Java

2. Write a method called indexOfSublist that accepts another list Las a parameter and returns the starting index of where L first appears in this list, or -1 if it is not found. All elements of L must appear in sequence and in the same order. For example, if variables called list1 and list2 store (11, -7, 3, 42, 0, 141 and 13, 42, 01. respectively, the call of list1.indexOfSublist(list2) should return 2