A ball is made of a material of density $\rho $ where ${\rho _{oil}}\, < \rho < {\rho _{water}}$ with ${\rho _{oil}}$ and ${\rho _{water}}$ representing the densities of oil and water, respectively. The oil and water are immiscible. If the above ball is in equilibrium in a mixture of this oil and water, which of the following pictures represents its equilibrium position?