A group of campers have been on vacation so long, that they've forgotten the day of the week. The following conversation ensues.Darryl: What's the day? I don't think it is Thursday, Friday or Saturday.Tracy: Well that doesn't narrow it down much. Yesterday was Sunday.Melissa: Yesterday wasn't Sunday, tomorrow is Sunday.Ben: The day after tomorrow is Saturday.Adrienne: The day before yesterday was Thursday.Susie: Tomorrow is Saturday.David: I know that the day after tomorrow is not Friday.If only one person's statement is true, what day of the week is it? -Riddles