Exercise 1 - (taken from a midterm) Two boxes of masses m and m2 are stacked as shown. b is the coefficient of viscous friction between all surfaces of contact and x1(t) and x2(t) denote the displacement of each box. x1(t) m1 x2(t) m2 1A - If a displacement 2 is applied to mass m2, find the transfer function between the displacement of mass m2 and the resulting displacement of mass m, that is H(s) = X1(s)/X2(s). 1B - Prove that if mass m2 is moved by 1 mm, mass m moves by the same amount in the same direction.