Question 8 of my math homework I am struggling with. Please only use calculas 2 formulas to help me better understand. Thank you!

A 4 foot diameter circular viewing window is placed in a holding tank 2 feet above the base of the tank - see figure. If the tank is 10 feet deep, and filled to 1 foot below the top of the tank, what is the hydrostatic force exerted on the window? (use water as 62,4 (b/ft3) 1 ft. 10 ft. 4 ft. 2 ft. Hydrostatic Force is: pounds