A cubical block of wood, 10.0 cm on a side, floats at the interfacebetween oil and water with its lower surface 1.50 cm below theinterface (see the cross section view in the figure). The densityof the oil is 790 kg/m3. (a) What is the gauge pressure at theupper face of the block? (b) What is the gauge pressure of thelower face of the block? (c) What is the mass and density of theblock? (m = 0.821 kg, ρ = 821 kg/m3)