$12.$ $$ \begin{array}{1} X:=3 X:=2 * X-X X:=2 * X+X X:=2 * X-X X:=2 * X+X X:=2 * X-X X:=2 * X+X Y:=2 * X+1 \end{array} $$ The above sequence of instructions will store in $y$. CS.JG.023