12. Cortex-M4 processors do not provide any rotation left instructions. They only provide ROR rotate right) and RRX (rotate right extended). Write an assembly instruction sequence to implement "rotate left" operation. 13. Write an assembly instruction sequence that reverses the byte order of a register without 14. Write an assembly instruction sequence that swaps the upper half-word and the lower half- 15. Implement the BFC (bit field clear) instruction by using other assembly instructions. using the REV instruction word of a register