''' Purpose: continue introduction to functions

    Name:

    Email id:

    Who checked your code: 

    Whose code did you check: 
'''

def is_factor( x, y ) :
    ''' Determines whether y is a factor x
    '''

    rem = x % y
    if ( rem == 0 ) :
        result = True
    else: 
        result = False

    return result

def are_relative_primes( x, y ) :
    ''' Determines whether x and y are relatively prime; i.e., whether y
        is not a factor of x and vice-versa
    '''

    ...


def is_prime( x ) :
    ''' Determines whether x is a prime number; i.e., its only factors are
        1 and itself
    '''
    ...