Write a method called lastIndexOf that accepts an integer value as a parameter and that returns the index in the list of the last occurrence of that value, or −1 if the value is not found in the list. For example, if a variable list stores the values [1, 18, 2, 7, 18, 39, 18, 40], then the call of list.lastIndexOf(18) should return 6. If the call had instead been list.lastIndexOf(3), the method would return –1.