(2) Let U = (1, 1) and u = (1, 2). (a) First, compute projy u. (b) Now find two more vectors, a and b, that have the same orthogonal projection onto v = (1, 1) as u = (1, 2). In other words, we want a and b to satisfy projy a = projy b = projy u. (You will likely want to sketch an illustration and also work with equations on paper, i.e., use both geometric and algebraic viewpoints.)