Provide the algorithmic efficiency for the following tasks. Justify your answer.

1. Determining whether a provided number is odd or even
2. Determining whether or not a number exists in a list
3. Finding the smallest number in a list
4. Determining whether or not two unsorted lists of the same length contain all of the same values (assume no duplicate values)
5. Determining whether or not two sorted list contain all of the same values (assume no duplicate values)