The drawing shows three objects. They are connected by strings that pass over massless and friction$-$free pulleys. The objects move starting from rest, and the coefficient of kinetic friction between the middle object and the surface of the table is $0\mathrm{.}128.($a$)$ What is the acceleration of the three objects? $($b$)$ Find the tension in the string attached to the $25\mathrm{.}0$ kg object. $($c$)$ Find the tension in the string attached to the $10\mathrm{.}0$ kg object.