Can you please help me answer these ?

Let v1, v2, w be three linearly independent vectors in r 3 . that is, they do not all lie on the same plane. for each of the following (infinite) set of vectors, carefully sketch it in r 3 , and determine whether or not it is a vector space (i.e., a subspace of r 3 ). explain your reasoning

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

What are similarities and differences between refraction, reflection, diffraction and absorption?