State the employee who are born in or after 1970 and with the least sick leave hour.
born in or after 1970 refers to year(BirthDate) > = 1970;
SELECT T2.FirstName, T2.LastName FROM Employee AS T1 INNER JOIN Person AS T2 ON T1.BusinessEntityID = T2.BusinessEntityID WHERE STRFTIME('%Y', T1.BirthDate) > '1970' ORDER BY T1.SickLeaveHours LIMIT 1