An elevator and its contents have a combined mass of 1.0 x 103 kg. It is suspended by a single cable in a frictionless environment. Which free-body diagram (FBD) describes the elevator when it is at rest? Question 7 options: a) A free body diagram with a box at the centre. There is one vector arrow, labelled Ft, pointing up. b) A free-body diagram with a box at the centre. There is one vector arrow, labelled Fg, pointing down. c) A free-body diagram with a box at the centre. There are two vector arrows, one labelled Ft pointing up, and the second labelled Fg pointing down. Each are equal in length. d) A free-body diagram with a box at the centre. There are two vector arrows both pointing down, the first is labelled Fg and the second is labelled Ft and is slightly longer. e) None of these FBD are correct