Please answer this:

Which of the following statements about makefiles are TRUE? Check all that apply When written properly, the last step in the makefile involves the compilation of object files into an executable Makefiles recompile files only when recompilation is needed, i.e. a file changed since the prior compilation When written properly, they support separate compilation of ADTs' implementation files into object files Makefiles execute line by line, from top to bottom Makefiles automate the compilation process