Consider the triangular gate in the figure below in responding to the following questions. The gate is hinged on the top horizontal edge. The gate sits in a tank of unset concrete with specific gravity $2\mathrm{.}35.$ The dimensions of the gate are b$=0\mathrm{.}45$ m along the top of the gate, with a distance from the top of the gate to the bottom of the tank a $=0\mathrm{.}4$ m$,$ and the gate is immersed in the unset concrete a depth of c $=0\mathrm{.}25$ m$.$