Answer:
Short the futures contract; Borrow at the risk-free rate; Long corn;
Step-by-step explanation:
Spot rate = $3.20
Therefore implied future rate = spot x ert
Therefore implied future rate = 3.20 x e0.05 x 6/12
Therefore implied future rate = 3.20 x 1.025315
Therefore implied future rate = 3.281
Since implied future rate < future rate, we will short future contract and borrow and buy at spot
Therefore, 1st choice is correct