Q3 3 Points Let 171, . . . , 274 be vectors in R4 such that for the matrix A = [61 62 {2'3 274] one has detA = 3. (23.1 1 Point Select all that apply: D 1 0 0 0 . 0 1 0 0 The reduced echelon form ofA IS 0 0 1 0 0 0 0 1 D There is not enough information to determine the echelon form of A. D A is invertible. D The equation ArE : 6 has multiple solutions. Q32 1 Point Select all that apply: |:l The set {'61,. . . , '34} a basis ofR4. D There is not enough information to determine if {171, . . . , 174} is a basis of R4. D '31 172 = 0 is possible. D '31 and '63 must be linearly independent. Q33 1 Point Select all that apply: D Nul(A) = {6} |:| Col(A) = R4