Fluid Mechanics

A freshwater lake has a depth of $27.5\,\text{m}$. Calculate the pressure at the bottom of the lake and the force exerted by the water on the window of an underwater vehicle at this depth if the window is circular and has a diameter of $35.0\,\text{cm}$, respectively. Take atmospheric pressure to be $1.013\cdot10^{5}\text{Pa}$.