Question #1 [2 marks]: Write more efficient code consisting of two ARM assembly instructions that are equivalent to the following instructions sequence: MOV ri, ri, LSR #2 ADD ri, r3, r1 MOV r4, r4, ROR #7 SUB r4, r6, r4 Question #2 [2 marks]: Write a single ARM assembly instruction which will multiply an integer stored in r8 by 7 and store the product in r5. (Note: you cannot use any of the explicit multiplication instructions; MLA, MUL, UMLAL, UMULL, SMLAL, O SMULL). Question #3 2 marks]: Given a signed 32-bit integer stored in r10. Write a single ARM assembly instruction that loads the 2's complement of rio in r4