Kris offers to sell his truck to Gina for $10,0100 payable in cash in 30 days. Three weeks go by Kris wakes up that morning and decides he does not want to sell his truck. He has forgotten completely about the offer to Gina. One hour later, Gina calls and says, "I accept your offer" a) Does Kris have of any grounds for not selling the truck to Gina? b) What could Kris have done to better protect himself and avoid any controversy over the expiry issue