For the differential equation s$+$bs$+4$s $=0,$ f ind the values of b that make the general solution overdamped, underdamped, or critically damped. $($For each, give an interval or intervals for b for which the equation is as indicated. Thus if the the equation is overdamped for all b in the range $1<$ b $1$ and $3$ b $<$ $,$ enter $(-1,1],[3,$infinity$)$; if it is overdamped only for b $=3,$ enter $[3,3].)$ If the equation is overdamped, b in If the equation is underdamped, b in If the equation is critically damped, b in