I'm designing a mass-spring-dashpot system, and the only dashpot I have has C= 5. I want the system to have a natural frequency $$\omega_0 = \sqrt{\frac{k}{m}} = 2$$, And I want the system to be critically damped so that $$C^2 - 4mk = 0$$. Find the MASS M And spring constant k to complete my creation.