I just need help to go the (( PROPAGATION OF ERROR )) for part 1 section (B) AND Part 2 for section (B). I HIGHLIGHT THEM WITH ( YELLOW COLOR )

I already made my lab report class ((  Circuits and Instrumentation Laboratory)) I just need help to go the (( PROPAGATION OF ERROR )) for part 1 section (B) AND Part 2 for section (B). 

 I just need help to go the (( PROPAGATION OF ERROR )) for part 1 section (B) AND Part 2 for section (B). I HIGHLIGHT THEM WITH ( YELLOW COLOR )