Please help me with this!

Consider a line L going through a point P0(xo,yo,zo) and with direction 13' = (a, b,c). Take also another point PCB, y, z). 1. Draw a picture showing all these quantities, as well as the distance d from the point P to the line L. 2. Consider the parallelogram determined by the vectors P0}; and '9'. Compute its area in two different ways: . using the crossproduct; . using basic geometry. 3. Deduce a formula for d. Write it with vectors. 4. Compute the distance of the point P(1, 2, 3) to the zaxis, and check with a picture and basic geometry that you get the right result