For the control points and weights below, find the parametric equation and the curve's coordinates at $u=0,u=0\mathrm{.}5,u=1,$ for a Non$-$Uniform Rational B$-$Spline of degree $2$:

$P_1=[-1,-1{]}^T,P_2=[0,3{]}^T,P_3=[3,0{]}^T,P_4=[-2,-2{]}^T$

$w_1=1,w_2=3,w_3=1,w_4=1$