1. A 1 m3 block of styrofoam, with a density of 100 kg/m3, is held submerged in an oil-water mixture by a tether as shown. The relative density of oil (to water) is 0.8. Assume atmospheric pressure is 101.3 kPa, L1= 3 m, and L2 = 3 m. Figure4-1.png Calculate the tension in the tether (in kN