I am trying to create a simple make file. I know the problem is with spaces or tab. I tried to change the spaces or tabs but it's still the same.

error. "Makefile 2 missing separator stop"

Please be aware if you'll copy an online solution or copy someone else's solution you will get a bad review.

1 all:a.out 2 echo: "Build Done!" 4 a.out:lab3sum17.O RB.o gcc lab3sum17.o RB.o 7 lab3sum17.0:lab3sum17.c RB.h gcc -c-Wall lab3sum17.c 0 RB.o:RB.c RB.h gcc -c -Wall RB.c 12 13 clean: rm -f .out .o 14 15