ma A uata using directives. 5.8 EXERCISES 1. Describe the contents of register r13 after the following instructions com- plete, assuming that memory contains the values shown below. Register rO contains 0x24, and the memory system is little-endian. Address 0x24 0x25 0x26 0x27 Contents 0x06 OxFC 0x03 0xFF a. LDRSB r13, [ro] b. LDRSH r13, [ro] c. LDR r13, r0] d. LDRB r13, ro] 2. Indicate whether the following instructions use pre- or post-indexed addressing modes: a. STR r6, [r4, #4] b, LDR r3, [r12], #6