7. (15 Points) Block A has a mass of 6.00 kg. Block B has a mass of 5.00 kg. The coefficients of friction between two blocks are /s = 0.400 and /k = 0.200. The coefficients of friction between the blocks and the ramp are /s = 0.500 and /k = 0.300. The ramp is angled at 150 above the horizontal. The man pulls the block up the incline. What is the largest force he can pull with if he doesn't want the top block to slip? A B