A triangular window, with its top edge horizontal, is built in the side of a water tank. The window is 12 m tall, 6 m wide at the top, and can hold back 30 kN of force. Water is added to the tank until the window is about to burst. If the density of water is 1000 kg/m and we approximate the gravitational constant as 10 m/s , how high is the water above the bottom corner? ) 3.30 m (B) Insufficient Information (C) 2.29 m (D) 2.62 m (E) 2.88 m