3. Consider a cylindrical concrete block with diameter = 1m and height = 0.75m. The block is partially submerged in saturated sand. The block's submerged depth is 0.25m. This means

that 0.5m of the block's height is visible (out of the ground). a. Calculate the weight of the block (in kN). The unit weight of concrete is Yc = 28 kN/m2. b. Calculate the stress at the base of the block (express answer in kPa). C. Calculate the uplift pressure at the base of the block (express answer in kPa). d. Calculate the factor of safety associated with uplift.