A machine of mass \(1150 \mathrm{~kg}\) is mounted on springs. A piston of mass \(m=25 \mathrm{~kg}\) moves up and down in the machine at a speed of \(600 \mathrm{rpm}\) with a stroke of \(350 \mathrm{~mm}\). Considering the motion to be harmonic, determine the maximum force transmitted to the foundation if

(a) \(k=1.75 \mathrm{MN} / \mathrm{m}\), and

(b) \(k=4.5 \mathrm{MN} / \mathrm{m}\).