A symmetrical tzoidal plate has the following dimension:?

The widths of the parrallel sides are, respectively, 2.5ft and 4.5ft; the perpendicular distance between those sides is 1.5ft. The plate is submerged in a liquid in a vertical position with the parrallel sides horizontal and the shorter parallel side at the top and exactly even with the surface of the liquid. The moment of inertia of the plate with respect to the surface of the water would be 2.39ft^4, 3.37ft^4, 3.39ft^4, or 4.49ft^4