40 which of the following sentences is written correctly? 1: simmer the stew {it should be steaming, but not boiling} for about 20 minutes. 2: simmer the stew [it should be steaming, but not boiling] for about 20 minutes. 3: simmer the stew, it should be steaming, but not boiling, for about 20 minutes. 4: simmer the stew (it should be steaming, but not boiling) for about 20 minutes.'