Hello I need your hello asap.

1. What area must a reservoir have if it is 200 ft thick and 1s entirely full of oil with a porosity of 20% and formation factor of 1.1 BBL/STB, in order to sell the oil to a refiner and have enough money to pay for the S100 million in wells it took produce the 0il? (Oil price $50/bbls). 2. A clean sandstone core plug has a volume of 30cm3 and a mass of 62 gr. The saturation of 0.8 gr/cc oil is 80% and there is not gas. After water is pumped into the core to extract all the oil the core has a mass of 64 gr. What 1s the porosity of the core? What 1s the density of the grains