can you please answer the question below on a line peace of paper with clear hand writing

1a. Draw an example of two opposite vectors that are not parallel or explain why such vectors don't exist.

1b. Explain, in your own words, why the cross product can be used in ^3 , but not in ^2 , while the dot product can be used in both spaces.

2. Show that | | ^2 + | | ^2 = || ^2 || ^2