HELP SOLVE THESE

1.I GO IN FRONT OF THIS TYPE OF "FOOD" FOR THINGS WE SHOULD ROUTINELY EAT IN AN OFFICE IF HAVE TWO BENT LEGS BUT DON'T HAVE ANY FEET.

2.I MAY HAVE PI BUT EATEN IT CAN'T BE. USE ITS ROOT BEFORE NINE AND YOU'LL GET THREE

3. I BEGIN WITH A GREETING. AND HAVE LIGHT IN THE MIDDLE. I CAN BE ANY COLOR OF THE RAINBOW WITH LINES BIG OR LITTLE