750kg 1750 kg 250 kg 500KA GO0 KG 1500kd ( = (0.6, 0.5) = (0.4, 03) Me= (0.20.1 ) M= (0-6, 013). M= (0 8, 0.5) 14 = ( 0 . 3 , 0 .1 ) There are six crates at rest on a level surfaces. The crates have different masses and frictional coefficient [ given as ( Ms, luk) ] between the crates and the surfaces differ. The scime external force is applied to each crate, but none of the crates move. Rank the crates on the basis of the frictional force acting on them. ( from the largest to smallest)