The tasks you've presented involve various vector operations, including determining vectors from given points, checking for parallelism, calculating angles between vectors, and finding equations for lines and planes. However, to provide a specific solution, I need actual numerical or algebraic inputs for the vectors or points, which are missing in your question.
Please provide the specific vector values or points for the calculations that you would like to perform. Once I have that information, I can assist you with each part of your query.