The branch manager for a bank has been asked to prepare a presentation for next week's board meeting. At the presentation, she will discuss the status of her branch's loans issued for recreation vehicles (RVs). In particular, she will analyze the loan balances for a sample often RV loans. The accompanying data were collected. Complete parts a through c below. $11,522 $8,068 $13,023 $17,016 $16,778 '3: $18,637 $4,953 $11,707 $18,867 $8,711 (E a. Compute the mean loan balance. The mean loan balance is $ 12902 _ (Round to the nearest dollar as needed.) b. Compute the loan balance standard deviation. The standard deviation of the loan balances is $-. (Round to the nearest dollar as needed.)