Gaussian Elimination and Gauss-Jordan Elimination involve the use of a natrix inverse identity variable augmented Is the following matrix in Row Echelon Form (REF), Reduced Row Echelon Form (RREF), or Neither? 1040 013 0 A 0 0 01 0 0 0 0 Select one: O a. RREF O b. REF O c. Neither What are the requirements for a matrix to be in Row Echelon Form (REF)? Select one or more: O a. The first non-zero entry in each row must be "1" O b. Rows with all zeros are below all rows with non-zero entries O c. Each leading entry in a row is to the right of the leading entry in the row above it O d. There must be an equal number of rows and columns O e. There can't be any rows with all zeros O f. All leading entries must have zeros above and below it in its column