Determine if H is a subspace of V, if possible. Explain why or why not. a. H is a subspace of V because H is the span of a subset of V.
b. H is not a subspace of V because H is not closed under vector addition.
c. It is not possible to say because we don't know the definitions of vector addition or scalar multiplication in V.
d. H is a subspace of V because every vector in H is also in V.
e. H is not a subspace of V because H does not contain the zero vector.
f. It is not possible to say because the vectors are undefined.