Figure Q5 shows a weightless rectangular gate AB with 5m wide into the paper. The gate will open to let freshwater (p=1000 kg/m) out when the seawater (p=1029 kg/m) is falling. The gate hinges at A which is 2 m below the freshwater level. Stationary wall Freshwater 10m Stopper B Figure Q5 Gate 1 Seawater Determine the magnitude of h: i) if the gate starts to open with the freshwater level at original value of 10 m, and ii) if the gate starts to open with the freshwater level increase up to 10% from its original value. [CO3/PO3/C5/DK5]