$2.$ If the static friction coefficient between blocks $\backslash ($ A $\backslash )$ and $\backslash ($ B $\backslash )$ is $0\mathrm{.}25$ and the static friction coefficient between lock $\backslash ($ A $\backslash )$ and the floor is $0\mathrm{.}35,$ determine the minimum $\backslash ($ P $\backslash )$ value required to maintain equilibrium. Create a free body diagram if required.