. contains all: given a list of integers, it returns True if the list contains all unique consecutive pos- itive integers starting from 1. The order in which the elements appear in the list is not important. For example: >>> contains_all([1, 2, 3, 4, 5]) True >>> contains all([3, 1, 2]) True >>> contains all([4, 5]) False >>> contains all([1, 1, 1]) False count_nun_of_pairs: given a list of integers, it returns the number of pairs in the list. Note that if a number appears 4 times in the list, this should count as two pairs, if it appears 6 times it should count as 3 pairs, and so on. The order in which the elements appear in the list is not important. 2. For example: >>> count_num_of_patrs([1, 1, 2, 2]) >>> count_num_of_patrs([1, 2, 1, 2, 1]) 2 >>> count_num_of_patrs [1, 1, 1, 2, 2, 1, 1]) 3 ts_included: given two lists of integers as input, it returns True if the second one is a subset of the first one, False otherwise. Note that once again, the order in which the elements appear in both list is not important. For example: >>> n = [1, 2, 4, 5, 5, 5] >>> m1 = [1, 5, 5, 5] >>> is included in, mi) True >>> # it remains the same after the function execution [1, 2, 4, 5, 5, 5] >>> 1 ) it remains the same after the function execution [1, 5, 5, 5] >>> m2 = [1, 1] >>> is included in, m2) False