Suppose that there are no storage costs for crude oil, and the interest rate for borrowing or lending is always 4% per annum. How could you make money if the June and December futures contracts for a particular year trade at $50 and $52, respectively? 1. Borrow funds at a risk-free interest rate & go short on June futures & go long on December futures 2. Invest funds at a risk-free interest rate & go long on June futures & go short on December futures 3. Invest funds at a risk-free interest rate & go short on June futures & go long on December futures 4. There is no arbitrage opportunity. 5. Borrow funds at a risk-free interest rate & go long on June futures & go short on December futures