def calculate_new_balance(account_balance, purchase):

# YOUR CODE HERE

raise NotImplementedError()Given two lists a and b, combine them, but don't change either

Use python and code .below are the observations

#

observed = calculate_new_balance(45098, 12075)

expected = 33023

assert observed == expected, f" You returned: {observed!r} instead of: {expected!r}"

observed = calculate_new_balance(10, 11)

expected = -1

assert observed == expected, f" You returned: {observed!r} instead of: {expected!r}"