I purchased a Brewers Best English Brown Ale kit and I hoping to brew this weekend. The yeast that was included is a Coopers 7g. I turned the package and noticed that it expired in 09. I know we are only technically, a few weeks past but I'm not sure I want to risk a batch with dead yeast. I have an extra package of Safale s-04 left over from my last batch of cider a couple weeks ago. Would this be an appropriate substitute?