3. a. Determine the vector and parametric equations of the line going through the points PO, 2. 3) and Q[1,2, a). h. Does this line have a system of symmetric equations? If it does have a system of symmetric equations, determine the system. If not, explain why. 4 marks 4. At what point does ie line L! r - [10.7,5,)+3(4,-3,2], S E R intersect1eplane F:x+Ty+1Elz-9-D? 4 marks