Please answer the following questions in full:

1. Determine vector and parametric equations for the plane containing the point Po(1, -2, 3) and having direction vectors a = (4, -2, 5) and b = (-3, 3, 7). 2. A plane contains the points A(-2, 1, 4), B(2, -1, -3) and C(-5, 2, 3). Determine vector and parametric equations for the plane. 3. Determine vector and parametric equations for the plane containing the point Po(2, 3, -1) and the line with equation (x, y, z) = (3,0,2) + u (-2, 1, 1), where u is a parameter