At the beginning of November, the 3-month T-Bill futures for Feburary 2019 was priced at 99. The spot 3-month T-Bill wa also trading at 99 at the beginning of November. The 6-month T-Bill futures for May 2019 was selling for 98.01 at the beginning of November. And finally, the 12-month spot T-Bill was selling for 97 at the beginning of November. If you can go long or short (borrow or invest) at any of these rates, show how you can make a risk free profit?