""" Create the following functions.
You can call them afterwards by typing in their function name
and passing in any necesasry arguments to verify. """

""" One. Create a function 'add_three' which takes three arguments
and adds all of them together """

""" Two. Create a function 'multadd' which takes three arguments
and adds the multiplication of the first two with the third
"""

""" Three. Create a function 'greeting' which returns the string
'hello there' """

""" Four. Create a function 'multiply_all' which takes five arguments
and returns the multiplication of them all """

""" Five. Create a void function (one which returns None) that prints
anything you want. """

""" Six. Create a function 'can_drink' which returns if the first argument
is at least 18 """

""" Seven. Create a function 'calculate_tax' that takes as first argument
the total before tax, and the second as the tax rate. Assume tax rate is given in decimal
and not percent i.e 5% tax is passed as 0.05 """

""" Eight. Create a function 'hash' which takes a number as first argument and another
as second. It returns the modulo of (the first times the second to the power of the second subtracted
from the first) with (the second minus the first). """

""" Nine. Create a function 'bitwise' that takes three arguments and returns
the bitwise and of the bitwise inversion of the first and the bitwise or of the second
and third """