What is the sea level and average speed for store number 3 and store number 4?
store number 3 refers to store_nbr = 3; average speed refers to avgspeed; store number 4 refers to store_nbr = 4
SELECT T1.sealevel, T1.avgspeed FROM weather AS T1 INNER JOIN relation AS T2 ON T1.station_nbr = T2.station_nbr WHERE T2.store_nbr = 3 OR T2.store_nbr = 4