Consider the following Atmel AVR Assembly Language code:

$\backslash$table$[[$SUB R$17,$ R$18,],[$BRNE$,$L$1],[$LDI$,$R$16,0$xff $,$; JMP is an unconditional jump$],[$JMP$,$L$2],[$LDI$,$R$16,0$x$00],[$STS$,0107,$ R$16]]$

a$.$ What does the BRNE instruction do$?$

b$.$ What effect does the JMP instruction have?

c$.$ Under what circumstances does R$16$ contain the value $000$ when this code is executed?

d$.$ Under what circumstances does R$16$ contain the value $0xFF$ when this code is executed?

e$.$ Where $($in which memory location$)$ is R$16$ stored when this code is executed?