[AAHL] Vectors (Unit Test v2.3)

Hiya!

Here's the unit test on vectors, to complete series Unit Test v2.3. The test has three standards as per usual - introduction to vectors, equations of lines and planes, and problems with lines and planes.

A good old tip when dealing with any vectors question: please sketch it out! The answer will pop out readily in most cases.

AAHL:

AAHL MS:

Andrew