Determine if each of the following sets is a subspace of Pn, for an appropriate value of n. Type "yes" or "no" for each answer. Let W, be the set of all polynomials of the form p(t) = at?, where a is...

Extracted text: Determine if each of the following sets is a subspace of Pn, for an appropriate value of n. Type "yes" or "no" for each answer. Let W, be the set of all polynomials of the form p(t) = at?, where a is in R. %3D Let W, be the set of all polynomials of the form p(t) = t +a, where a is in R. Let W3 be the set of all polynomials of the form p(t) = at? + at, where a is in R.