Grading: 10pts   Q1: 1pt  Q2: 7pts  Q3: 2 pts

1) -rw------ (or 600)
2) 
	chmod u=rwx newfile   or chmod u+x newfile
	chmod 500 newfile
	chmod u=rwx,g=r,o=r newfile     chmod u+w,g+r,o+r newfile     chmod u+w,go=r newfile (or many other answers that could be correct)
	-rwxr-xr-x
	chmod g=rw,o= newfile      chmod g+w,g-x,o= newfile    (or many other answers that could be correct)
	chmod 545 newfile
	-rwxrw---x

3) ln -sf oldfiles/file_a file_b