Need help e calculation

Consider a 12-months futures contract on silver. Assume no income and that it costs $X per ounce per year to store silver, with payment being made at the end of the year. The spot price is $26 per ounce and the risk free rate is 4% per annum for all maturities, based on continuous compounding. The futures price of the 12- month futures contract on silver is $29 per ounce. Assume that no arbitrage Futures-Spot parity with storage costs holds. The storage cost per ounce per year ($X) is, a. $2.88 b. $1.86 c. $1.94 d. $3.00 e. $2.15