Table: racing_results_3
Columns: year
entrant
chassis
engine
points

Question: What is the greatest point of an Entrant of connaught engineering alta straight-4 engine before 1957
SQL: SELECT MAX("points") FROM racing_results_3 WHERE "engine" = 'alta straight-4' AND "entrant" = 'connaught engineering' AND "year" < 1957

Question: What 1957 engine has a Chassis of connaught type b?
SQL: SELECT "engine" FROM racing_results_3 WHERE "chassis" = 'connaught type b' AND "year" > 1957