Is it true that g(n)/f(n) = O(n)

29. Show that if f(n) = 0 (n?) and g(n) = 0 (ny), then f(n)+g (n) = 0 (n3) and f(n)g (n) = 0 (n5). In this case, is it true that g (n) /f (n) = 0 (n)