1. Find the vector equation of a plane
a) passing through the point A(-1,2,-3) and parallel to the vectors u = (-2,1,0) and v = (2,-3,-1)
b) passing through the points A(2,3,2) and B(2,1,5) and C(3,-1,0)
c) passing through the origin and containing the line r = (1,-3,2) + t(1,1,1)
d) passing through the point A(2,-1,3) and is parallel to the yz-plane.