If we assume that the ice market is perfectly competitive in a time of crisis

how using the supply and demand model that a rise in the price of ice could help a ice producer/supplier earn above-normal profits in the short run.

Also use the supply and demand model to show that in the long run, the individual producers/suppliers can only earn zero economic profit.

Bellow is an article attached https://www.econlib.org/library/Columns/y2007/Mungergouging.html?to_print=true