1.
a. 
def mystery1(num1, num2):
    """Creates a list containing num2 repeated num1 times"""
    l = []
    
    for i in range(num1):
        l.append(num2)
    
    return l

b.
def mystery2(num1, num2):
    """Creates a list containing num2 repeated num1 times"""
    return [num2]*num1

c.
def mystery3(l):
    """Reverses the input list"""
    for i in range(len(l)/2):
        other_index = len(l)-i-1
        temp = l[i]
        l[i] = l[other_index]
        l[other_index] = temp