Z2 b k1 www C m fa(t) www k2 a) Obtain an SSR of this mechanical system where position of the mass is the system output, and the applied force is the input. (assume the zero-mass node that connects the k spring to k spring and b damper only moves horizontally). b) Given the following parameter values use MATLAB to plot the system output for a step force of 1N which is applied at t = 1s. k1 = 2N/m, k2 = 4N/m, b = 3Ns/m, m = 1kg [2 marks]