Modify the output $($lines $44$ and $45)$ to print out data in the following format $->$ Smith: $123456=>$ $$250\mathrm{.}59$

Which of the following matrices is in reduced row echelon form $($RREF$).$

$A$:$([1,0,2,-3,0],[0,1,-1,4,5],[0,0,1,0,0])B$:$([1,0,0,1,0],[0,1,-2,3,1],[0,0,0,0,0])C$:$([1,0,0],[0,1,0],[0,0,0])D$:$([1,-1,0,0],[0,0,3,3],[0,0,0,0])$

A

B

C

D