Answer the following questions involving the Rank-Nullity Theorem and matrices. (a) Give an example of a 2 × 3 matrix with rank 1. (b) What is the dimension of the null space for the matrix you answered in (a)? (c) Given a 4 × 6 matrix � with dim(����) = 2, what is the rank of �? (d) Given a 4 × 6 matrix � with dim(����) = 2, do the columns of � span