5. [3pt] With reference to Part C and Fig. 4-1 of the lab manual, determine which of the following statements are correct. E.g., if A and C are true, enter AC. A) To apply the simple formula you will derive in Part C, subjects must place their feet directly over one end of the board. B)It is sensible to use a pencil to mark or write anything on the board. C) The placement of the fixed pivot relative to the end of the board is critical; it must be exactly 1/8 of the way along D) The board's centre-of-mass should be quite close to the board's centre. E) The distance d, represents the distance from the fixed pivot to where F, is applied