Required: 1a. Which Salesperson has the highest total sales during the 12-month period? What was the amount? 1b. Which Salesperson has the lowest total sales during the 12-month period? What was the amount? 1c. Which Salespeople had the fourth and sixth highest sales? How much did each of them sell during the 12-month period? Required: 1a. Which Salesperson has the highest total sales during the 12-month period? What was the amount? 1b. Which Salesperson has the lowest total sales during the 12-month period? What was the amount? 1c. Which Salespeople had the fourth and sixth highest sales? How much did each of them sell during the 12-month period