use python 3 please

do not sort the array.

1.2 Problem 2 1.2.1 Part A Write a function last_index(L,x)) that returns the index of the last occurance of the object in the list L. The function returns -1 if there is no such index. 1.2.2 Part B Consider lists of integers. Write a function **second_smallest (L)** which returns the index of the second smallest number in the list. The function should return -1 if there is no such thing