For a typical mass$-$spring damper system given below, what values of

k $($spring constant$),$ b $($damping coefficient$)$ and m $($mass$)$ will give an

underdamped system?

$k=10\frac{N}{m},b=20N*\frac{s}{m}$ and $m=5kg$

$k=5\frac{N}{m},b=10N*\frac{s}{m}$ and $m=6kg$

$k=15\frac{N}{m},b=10N*\frac{s}{m}$ and $m=1kg$

$k=5\frac{N}{m},b=15N*\frac{s}{m}$ and $m=5kg$

I would like to know if my answer is correct