1.The library function last selects the last element of a non-empty list; for example, last [1,2,3,4,5] = 5. Show how the function last could be defined in terms . Provide another possible definition Explain each definition.

2.The library function init removes the last element from a non-empty list; for example, init [1,2,3,4,5] = [1,2,3,4]. Show how init could similarly be defined in two different ways.? Explain each definition.