Controlling force of a spring controlled governor, Fc = 2800 r - 76, where Fe is in Newton and r is in meter. If mass of ball is 5 kg, extreme radii of the balls are 100 mm and 175 mm, the coefficient of insensitivity of governor at extreme radius (175 mm) if friction in governor is 5 N at each ball, is (a) 1.19% (b) 0.094 % (c) 9.22 % (d) 3.29 %