How does excess of pressure inside a bubble vary with its radius?

If the surface tension of soap water is 27 dyne/cm then what will be the excess pressure inside the bubble of 3 cm radius.

What is the excess pressure inside a spherical soap bubble of radius 5 cm if the surface tension of the soap film is 3.5xx10^(-2)Nm^(-1) ?

The excess pressure inside a soap bubble of radius 8mm raises the height of an oil columns by 2mm. Find the surface tension of the soap solution. Density of the oil=0.8g. Cm^-3 .

How does the magnetic moment of a circular coil vary with its radius?

Why is there an excess of pressure inside a liquid drop?