How long it will take the following printf to execute for a l MHz processor connected to a serial port. The serial port is configured to work at 2400 baud. a. printf("the total of mid & final value of grade is %d", grade). (2 pts) b. For the following function, find the total execution time in seconds assuming a 5MHz microcontroller (4 pts) MOV r1, #4 MOV r3, #0x01 ADD MOV r2,#0x19 B test MLA r3, r0, r0, rl UDIV r3, r3, ro ASR ro,r3, #1 ADD r2, r2,#0x1 CMP r2,#0x20 BE loop BX lr (2 cycle clocks) [2 cycle clocks [2 cycle clocks) [2 cycle clocks] 2 cycle clocks] [5 cycle clocks] 5 cycle clocks] 5 cycle clocks) [5 cycle clocks) S cycle clocks) [8 cycle clocks) [2 cycle clocks] i. start r0, r3, rl, LSL #2 iv. vi. loop vii viii ix. test X. XL. xii