# a5.py
# YOUR NAME(S) AND NETID(S) HERE
# DATE COMPLETED HERE
"""Primary module for Assignment 5.

This module contains the Vector and Matrix classes to be implemented as
part of this assignment."""
import math

class Vector(object):
    """Instances are a vector in 2-dimensional space.
    
    The vector has two attributes: x and y. It represents a vector of the
    form (x,y). It is a mutable object, so the attributes values can be
    altered at any time."""
    pass


class Matrix(object):
    """Instances are 2x2 matrices.
    
    The matrix has three attributes: a, b, c, and d. It represents a matrix
    of the form::
    
        a    b
        c    d
        
    It is a *immutable* object, so the attributes values cannot be altered
    after the object is constructed."""
    pass