What is the output when the following code executes?

def mystery(a, b):
    a = a + 1
    b = b - a
    print(a, b)

def main():
    a = 6
    b = 2
    mystery(a, b)
    print(a, b)
    a = a * 3
    b = b + a
    mystery(b, a)
    print(a, b)
main()

What is the output when the following code executes?

def mystery(a, b):
    a = a * 2
    b = b + a
    print(a, b)

def main():
    x = 1
    y = 7
    mystery(x, y)
    print(x, y)
    z = x + y
    y = z / 2
    mystery(z, y)
    print(y, z)
main()

What is the output when the following code executes? (If there are more blanks than lines of output, put a single -  in the blank.)

def function1():
    print('A')

def function2():
    print('B')
    function1()
    print('B')

def main():
    function1()
    function2()
    function1()
main()

What is the output when the code executes?

def mystery(c, a, b):
    print(f'{b} + {c} = {a}')
def main():
    a = 4
    b = 7
    c = -2
    mystery(a, b, c)
    mystery(c, 3, a)
    mystery(a + b,  b + c, c + a)
main()