Fluids Questions

A soap bubble, having radius of $1\text{mm}$, is blown from a detergent solution having a surface tension of $2.5\times 10^{-2}\text{N/m}$. The pressure inside the bubble equals at a point $Z_0$ below the free surface of water in a container. Taking $g=10{\text{m/s}}^2$, density of water $=10^3{\text{kg/m}}^3$, the value of $Z_0$ is:

A small hole of area of cross-section $2{\text{mm}}^2$ is present near the bottom of a fully filled open tank of height $2\text{m}$. Taking $g=10{\text{m/s}}^2$, the rate of flow of water through the open hole would be nearly: