In each case, determine Whether or not the lines have a single point of intersection. If they do, give an equation of a plane containing them. a)r1 = (5t,21 1,3t3) andrz = (16,t+5,t9) b) I'1 = (31,3t+ l,t4> andrz = (2t2,t,t 1) (Express numbers in exact form. Use symbolic notation and fractions where needed. Enter DNE if lines do not intersect.) (a) the equation of the plane: (b) the equation of the plane