Let's consider the supply and demand curves for natural gas. Suppose that the supply curve is ________. Q_s = 10 + 0.6P_G + 0.05P_O and the demand curve is ________. Q_d = 0.01 - 2P_G + 0.5P_O, where Q_s represents the quantity supplied, P_G represents the price of natural gas, and P_O represents the price of other goods. What is the equation for the supply curve?