Give me the maximum low temperature and average precipitation at the Amersham station.
create table weekly_weather (low_temperature integer, precipitation integer, station_id varchar, PRIMARY KEY (low_temperature)); create table station (id varchar, network_name varchar, PRIMARY KEY (id))
select max(t1.low_temperature), avg(t1.precipitation) from weekly_weather as t1 join station as t2 on t1.station_id = t2.id where t2.network_name = "amersham"