I'm trying to solve those two questions

Let M be the matrix 10 0 0 0 1 . a) Find a matrix P whose RREF is M. b) Is there a matrix F, whose entries are all odd numbers, and whose RREF is M? Explain.Let A be the matrix below. Determine if A is in RREF and, if not, find its RREF. Use the RR.EF of A to describe concretely and precisely the solution set of the homogeneous system Af = 0. If there are multiple solutions the description should be given in terms of free variables. 09 O 0 Q 0 1 0 2 A U 001 1 0 0 0 0 C O O O O