[K 4]Convert the equation of the given line to the vector and symmetric forms. x=12t y=1+3t z=2+t tER [T 4] Find the vector equation of the plane TE that passes through the (1, D, 1) and contains the line L: r =(D,1,2)+ t{-1,0,3}; tR [C 1] How can we tell if two planes will NOT intersect