In the figure, a ladder of weight 200 N and length 10 meters leans against a smooth wall (__no friction on wall__). A firefighter of weight 600 N climbs a distance x up the ladder. The coefficient of __friction between ladder and the floor__ is 0.5. What is the maximum value of x if the ladder is not to slip?

A) 6.28 m

B) 6.04 m

C) 8.44 m

D) 3.93 m

E) 5.00 m

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