List out sale rep that has sold 1969 Harley Davidson Ultimate Chopper. List out their names and quantity sold throughout the year.
1969 Harley Davidson Ultimate Chopper refers to the name of the product; sale rep refers to employee; 2003 refers to year(orderDate) = 2003; quantity sold refers to quantityOrdered; their names refer to the name of customers; 
SELECT t5.firstName, t5.lastName, SUM(t2.quantityOrdered) FROM products AS t1 INNER JOIN orderdetails AS t2 ON t1.productCode = t2.productCode INNER JOIN orders AS t3 ON t2.orderNumber = t3.orderNumber INNER JOIN customers AS t4 ON t3.customerNumber = t4.customerNumber INNER JOIN employees AS t5 ON t4.salesRepEmployeeNumber = t5.employeeNumber WHERE t1.productName = '1969 Harley Davidson Ultimate Chopper' GROUP BY t5.lastName, t5.firstName