s (as points) Analyze assembly program Consider the following code segment. data .cstring "32SLab. mystr : .text mov.w mov.wtr, R4 i Assemble into progran memory. #STACK END,SP ; Initialize stackpointer StopMOT: movDTPW WDTHOLD, &WDTCTL i Stop watchdog timer gnext: mov.b @R4, R5 lend lnext j1 jmp sub-b add.b lconv lcopy #"a", #'A.,RS Iconv: RS lcopy: mov.b RS, e(R4) lnext: inc.w R4 jmp gnext lend: jmp jump to current location ' (endless loop) A. (20 points) What does this program do? Add code comments B. (5 points) Calculate the total execution time in seconds (time it takes for the program to reach statement in line 20). Assume the clock frequency is 8 MHz. How many instructions are executed in this program (before reaching the infinite loop)