Explain steps to get the answers

Question 3. (a) Consider the following set of vectors in R?: 2 -1 2 10 -7 3 2 1 Does the set span R*? Justify your answer. (b) Consider the following vectors in R: 1 1 1 0 1 1 u = |0 ug=|9],.... u, = |1 0 0 1 (The vector u; has its first entries equal to 1. and the remaining entries equal to 0.) Determine whether uy,....u, span R" without using any computation