A block of mass $5\ \text{kg}$ rests on a rough incline that makes an angle of $37^\circ$ with the horizontal ($\sin 37^\circ = 0.6$, $\cos 37^\circ = 0.8$). The coefficient of static friction between the block and the incline is $0.25$, so on its own the block would slide down. A horizontal force F pushes the block towards the incline, as shown in the figure. Taking $g = 10\ \text{m/s}^2$, the smallest value of F that keeps the block at rest is closest to

Fig. 1: A 5 kg block on a rough incline at 37 degrees, with a horizontal force F pushing it towards the incline.