4. Here is an equation for a spring-mass system: " + 4./' + 50 = 0. 53 (a) What are the interpretations of the " 4 "and the "5" ? (b) Find the general solution. (c) Give a rough sketch of the solution to the equation using the initial values r(0) -1, :'(0) = -1. (You do not need to solve the IVP to do this, so do not solve the IVP.) (d) Classify the type of damping this system exhibits. Explain