The following figure shows that 5"-by-5" square tiles can be used to cover a floor that measures 30" by 70". Each square in the figure represents a 5"-by-5" square tile. (a) List all of the sizes of square tiles that can be used to tile the floor. What is the largest size of square tile that can be used? (b) How many square tiles of the largest size are used to cover the floor? (a) The possible square tiles have sides that are inch(es) long. (Type whole numbers. Use a comma to separate answers as needed.) The largest square tile that can cover this floor has sides that are (Type a whole number.) inch(es) long. (b) The number of tiles of the largest size required to cover the floor is 13 30 I