3. Linear Independence and Span a) Explain whether the set is linearly independent or dependent by in- spection (i.e. don't calculate anything. The answer should be clear im- mediately) 0006 { b) Determine if the set spans R 2 000 -3 { 2 1 } c) Determine if the set is linearly independent or dependent {x1,x+1, x + x + 1} d) Give a geometric reasoning as to why any set of 3 vectors in R is linearly dependent