To save your valuable time we are not going to provide a concrete example here, as it would be very similar to what we have illustrated when deriving the formula F(0, T) = S0(1 + r)T to price a forward contract.
The futures price is
Note that futures contracts are homogeneous and fungible. The marking-to-market process results in each futures contract being terminated every day and reinitiated. Any contract for delivery of the underlying at T (expiration day) is equivalent to any other contract, regardless of when the contracts were created.
F0(T) = S0(1 + r)T = 55 (1.0425) 77/365 = $55.49.
A. Buy the asset for $72 and sell the futures for $75.4019.
F0(T) = S0(1 + r)T = 72 (1.075) 233/365 = $75.4019. As the price of the futures contract is what it should be, there is no arbitrage opportunity at all.