Please draw free body diagrams to explain the answer!!!

The drawing shows three blocks, each with the same mass, stacked one upon the other. The bottom block rests on a frictionless > horizontal surface and is being pulled by a force F that is parallel to this surface. The surfaces where the blocks touch each other have identical coefcients of static friction. Which one of the fol lowing correctly describes the magnitude of the n_etforce of static friction fs that acts on each block? .-\"- 11c = 0 and fat = 129/ 2 "5 12;; = fsB = far/2 1'\" = EB = fat -. I'm = 0 and fig = fs.C)'l2 '75 1cm: EL: fst2