Open the simulation (https://www.iphysics.com)
Archimedes' principle states that an object submerged in fluid is buoyed by a force that is equal to the weight of the displaced fluid. If you increase the mass of the object while keeping the volume constant, what happens to the density?
Run the simulation. You can change the densities of the object and the fluid in the simulation. What happens when the density of the object is less than that of the liquid? What happens when the density of the object is greater than that of the liquid?
Set the mass to 5 g and the density to 0.1 g/cm^3. Run the simulation. Wait for the object to totally sink in the liquid. Check "Show Numbers" and "Force-Body Diagram". How does the volume of the liquid displaced compare to the volume of the object? What is the volume of the liquid displaced in this case? How does the mass of the liquid displaced compare to the mass of the object? Which quantity is affected by a change in the fluid viscosity?