P$\mathrm{.}6\mathrm{.}44.$ How much force $F$ must be applied to the wedge to begin to raise the crate? Neglect changes in geometry. What force must the stopper block provide to prevent the crate from moving to the left? The static coefficient of friction between all surfaces is $\mathrm{.}3.$

Figure P$\mathrm{.}6\mathrm{.}44.$