When an 8-bit or 16-bit data is loaded from the data memory into a 32-bit register, whether sign extension or zero extension is performed depends on the data's sign. LDRSB (load register with signed byte) LDRSH loads a signed byte and LDRB (load register with byte) for an unsigned byte. LDRSH (load register with signed halfword) and LDRH (load register with halfword) read load a 16-bit signed and unsigned number from memory into a register, respectively. What is the value in register ri in the following instructions if ro - 0x20008000? Assume the system is little endian. (1) LDRSB ri, [ro] (2) LDRSH r1, [ro] (3) LDRB r1, [ro] (4) LDRH r1, [ro] Memory address 0x20008002 0x20008001 0x20008000 0x20007FFF 0x20007FFE Data OxA1 OxB2 OxC3 @xD4 OxE5