Chapter 4.3, Problem 28E

To see the effect of changing the parameters $b$ in the initial value problem

$y^{″}+b{y}^{\prime }+4y=0$ ; $y\left(0\right)=1$, $y^{\prime }\left(0\right)=0$,

Solve the problem for $b=5$, $4$, and $2$ and sketch the solutions.