You want to move a 40.0 kg desk to a different corner of your room. There is a 1.50 kg laptop resting on the desk that will be moved along with it. When considering the two materials in contact (the desk on the floor), the coefficient of static direction is 0.30 and the coefficient of kinetic friction is 0.25. a) how much force must you exert on the desk to make it slide along the floor? b) how much force must you continue to exert to move the desk at a constant velocity to its destination