Consider the following linear transformation. T: R2 R2 defined by -> by [x] = [-] 4x + Find the nullity of T. nullity(7) = Determine if the linear transformation is one-to-one. Oone-to-one O not one-to-one Determine if the linear transformation is onto. O Onto, because T is one-to-one and the domain and codomain have the same dimension O Onto, because T is not one-to-one and the kernel is nontrivial. O Not onto, because T is one-to-one and the domain and codomain have different dimens O Not onto, because T is not one-to-one and the kernel is trivial.