What does the mystery1 function do? 

def mystery1(x): 
    return x * -3

What does the mystery4 function do? 

def mystery4(x, y): 
    return x – y 

What does the mystery7 function do? 

def mystery7(x, y): 
    if (x <= 0): 
        return y 
    else: 
        return x

What is the output of the mystery12 function when called with an argument of 6? 

def mystery12(x): 
    return x // 3 
 
print(mystery12(6))