A sled weighing 59.0 N is pulled horizontally across snow so that the coefficient of kinetic friction among sled and snow is 0.100. A penguin weighing 71.0 N rides on the sled, as in the figure below. If the coefficient of static friction among penguin and sled is 0.700, discover the maximum horizontal force that can be exerted on the sled before the penguin begins to slide off.