Two identical blocks, each weighing 5.00 kg, are stacked as shown in the figure. The bottom block is free to slide on a frictionless surface. The coefficient of static friction between the blocks is 0.100. What is the maximum horizontal force that can be applied to the lower block without the upper block slipping?
(1) 9.80 N
(2) 39.2 N
(3) 88.2 N
(4) 67.3 N
(5) 51.7 N