Q1. At the time of Rusal's concern, primary aluminum prices were relatively high at $3,600 per metric ton. At this price, calculate the monthly rate of inventory growth in the global aluminum market using the given demand and supply equations for the world aluminum market.
Q2. Rusal believed the price of aluminum would fall because of the growing accumulation of inventories worldwide. Estimate Rusal's prediction by using the demand and supply equations to make a prediction about the movement of world aluminum price?