设有关寄存器及存储单元的内容如下:(DS)=1000H,(BX)=0100H,(SI)=0002H,(10100H)=12H,(10101H)=34H,(10102H)=56H,(10103H)=78H,(11200H)=2AH,(11201H)=4CH,(11202H)=0B7H,(11203H)=65H,试说明下列各条指令执行完后,(AX)=?并写出源操作数的寻址方式。(AX)源操作数寻址方式(1)MOVAX,[1200H]_______________________________(2)MOVAX,[BX][SI]_______________________________(3)MOVAX,[1100H+BX+SI]_______________________________