A partially saturated soil sample is taken from a borrow pit and tested for its specific gravity, which is found to be 2.65. If the air content and water content of this sample is 20% and 26.5% respectively. Calculate the void ratio of the partially saturated soil sample when water content is 26.5% and change in the air content of the soil sample if the water content increased to 30%

Assume void ratio to be constant.