Functions in Python are defined using the keyword def followed by the function name, the parameter names in parentheses, a colon, and the function body indented. For example:

def print_both(first, second):
    print(first)
    print(second)

Defines a function that takes two arguments as first and second and prints them on two separate lines. Once defined, it could be called as follows:

print_both('Hello,', 'World!')

Fill in the placeholders so that the actual outputs match the expected outputs.