Alternative Exercise 11.118 Part B Express your answer using two significant figures. An 77 kg person stands on a uniform 5.0 kg ladder that is 4.0'm long, as shown in the figure(Figure 1). The floor is rough; hence, it exerts both a normal force, f1, and a frictional force, f2, on the ladder. The wall, on the other hand, is frictionless; it exerts only a IVO AEd normal force, f3. f2 = Submit Request Answer Figure Part C Express your answer using two significant figures. IVO AEd O C. a = 3.8 m f3 = KN Submit Request