$(15$ points$)$ Find the roll rate and rear suspension roll stiffness for a vehicle with the following parameters.

$\backslash$table$[[$Sprung mass,$2000$ lb$],[$Unsprung mass,$200$ lb$],[$CG Height,$10$ inches above roll axis$],[\backslash$table$[[$Independent front suspension$],[$roll stiffness$]],1500in-l\frac{b}{d}eg$