1. The problem statement, all variables and given/known data which of the following are linear transformations. a) L(x,y,z) = (0,0) b) L(x,y,z) = (1 ,2, -1) c) L(x,y,z) = (x^2 + y, y - z) 3. The attempt at a solution I know that L is a linear transformation if L(u + v) = L(u) + L(v) and L(ku) = kL(u). I am not sure how to apply that to those equations. Please help.