Lo M1 M2 + k Lo Mmm frictionless surface X=0 X1 X2 1) A pair of masses, M, and My are joined by a spring of constant & and natural (unstretched) length Lo- la) (5 points) Find the amount the spring is extended or compressed (4z) as a function of the position of each mass (21 and 22, respectively). Make sure Ar is positive when the spring is extended and negative when it's compressed