A diver 60 m deep in 10^\circ{\rm C} fresh water exhales a 1.5 {\rm cm} diameter bubble.

A diver 60 m deep in 10^circ{rm C} fresh water exhales a 1.5 {rm cm} diameter bubble.What is the bubble's diameter just as it reaches the surface of the lake, where the water temperature is 20^circ{rm C}? Assume that the air bubble is always in thermal equilibrium with the surrounding water.