12. The standard deviation of monthly changes in the spot price of oil is 1.20. The standard deviation of monthly changes in the futures price of oil for the December contract is 1.40. The correlation between the futures price changes and the spot price changes is 0.70. It is now October 15. An oil consumeris committed to buying 210,000 gallons of oil on November 15. The consumer wants to use the December contract to hedge risk. Each futures contract is on 42,000 gallons. How can the consumer make a minimum variance hedge