Max is stacking logs at his campground for firewood. After his first load of logs, he has 12 logs on the stack. After his seventh load of logs, he has 60 logs on the stack. Use sequence notation to represent the arithmetic function. an = 12 + 8(n − 1) an = 60 + 8(n − 1) an = 12 + 6(n − 1) an = 60 + 6(n − 1)