6. The following table gives data on daily changes in the spot price and futures price for a certain commodity: .S +5 +6 -2 -3 +8 +o -5 -4 +1 +7 .F +6 +6 -1 -5 +6 -1 -6 -4 +o +8 (a) Use the data to calculate a minimum variance hedge ratio for a company that knows it will purchase the commodity in one month. Ignore tailing adjustments to account for daily settlement. (b) Evaluate how well a hedging strategy based on the minimum variance hedge ratio would have worked for each day of the 10-day period covered by the data, i.e. compute the value of the hedge for each of the ten days by adding losses/ gains from both the spot and futures positions