How old were the actors in Výstraha (1954)?

In the last days of the war, American planes bomb a synthetic gasoline plant in the Sudetenland. The workers are then faced with the enormous task of building a new plant on the site of the ruins and starting production. Their efforts are truly bearing fruit - after immense sacrifices, Stalin's plants are back in full swing, which is something that competitors abroad don't like to see and they try to use the reaction to liquidate the production of synthetic gasoline...