A one-year gold futures contract is selling for $1,641. Spot gold prices are $1,700 and the one-year risk-free rate is 2%. What arbitrage opportunity...

A one-year gold futures contract is selling for $1,641. Spot gold prices are $1,700 and the one-year risk-free rate is 2%. What arbitrage opportunity is available to investors? What strategy should they use, and what will be the profits on the strategy