You are trying to slide a heavy trunk across a horizontal floor. The mass of the trunk is 85kg, and you need to exert a force of 3.3x10'N to make it just begin to move. a) Determine the coefficient of static friction between the floor and the trunk. b) After the trunk starts moving, you continue to push with this force. The trunk reaches a speed of 2.0m/s after 5.0s. Calculate the coefficient of kinetic friction. ( T/I - 10)