:Listen Consider the code contains following variables. var1 DWORD 10h var2 DWORD 20h var3 DWORD 30h var4 DWORD 40h Write code to exchange the values among the variables above. You can only use one temporary storage - variable or register. You can ONLY move (MOV) or exchange (XCHG) values from one storage to another. No other instructions are allowed. After executing your code, var1 contains 20h, var2 contains 40h, var3 contains 10h, and var4 contains 30h.