A mass M is in equilibrium when attached to two horizontal springs stretched between two parallel walls (see picture). The two springs have spring constants k and k, and their unstretched lengths are and 2. The distance L between the walls is greater than 11 +12. K E K Fwww ww At time t = 0 we pull the mass aside by a small distance A from its equilibrium position and let go. (a) Determine the oscillation period T of this oscillation. (b) Determine the position x(t) as a function of time. Note that at time t = 0 the position is x = A. (c) Determine the velocity v(t) as a function of time. (d) Determine the acceleration a(t) as a function of time.