Two blocks ($$m = 0.5$$ kg and $$M = 4.5$$ kg) are arranged on a horizontal frictionless table as shown in the figure. The coefficient of static friction between the two blocks is $$\frac{3}{7}$$. Then the maximum horizontal force that can be applied on the larger block so that the blocks move together is $$N$$. (Round off to the Nearest Integer) [Take $$g$$ as 9.8 m s$$^{-2}$$]