I am taking a Linear Algebra class to finish up my master's degree in math curriculum and instruction. I have been doing okay until these questions. I need some help. True/False 1. If Ax=b has infinitely many solutions, then so does Ax=0. 2. If Ax=b is inconsistent, then Ax=0 has only the trivial solution. 3. The fewest number of hyperplanes in R^4 that can intersect in a single pt is 4. 4. If W is any plane in R^3, there is a linear system in three unknowns whose solution set is that plane. 5. If Ax=b is consistent, then every vector in the solution set is orthogonal to every row vector of A. I really hope that someone can help me!!!