An insect is at the bottom of a hemispherical ditch of radius 1 m. It crawls up the ditch but starts slipping after it is at height h from the bottom. If the coefficient of friction between the ground and the insect is 0.75, then h is: (g = 10 ms^–2)

(1) 0.20 m

(2) 0.60 m

(3) 0.80 m

(4) 0.45 m