Nick has a piece of land. Gina wanted to purchase it, then changed her mind. The following exchanges took place through the postal system (mailing). June 1 Gina mailed a letter to Nick, offering to buy the land for $50,000. June 2 Gina mailed a second letter to Nick, withdrawing Gina's June 1 offer. June 3 Nick received Gina's June 1 letter that included Gina's June 1 offer. June 4 Nick mailed a letter to Gina in which he accepted Gina's June 1 offer. June 5 Nick received Gina's June 2 letter that withdrew Gina's June 1 offer. It is now June 6