Boolean Chain

Write three functions:

1. boolean_and
2. boolean_or
3. boolean_xor

These functions should evaluate a list of True and False values, starting from the leftmost element and evaluating pairwise.

Examples

boolean_and([True, True, False, True]) ➞ False
# [True, True, False, True] => [True, False, True] => [False, True] => False

boolean_or([True, True, False, False]) ➞ True
# [True, True, False, True] => [True, False, False] => [True, False] => True

boolean_xor([True, True, False, False]) ➞ False
# [True, True, False, False] => [False, False, False] => [False, False] => False

Notes

• XOR is the same as OR, except that it excludes [True, True].
• Each time you evaluate an element at 0 and at 1, you collapse it into the single result.