Looks like your starting gravity is 1.045, which puts you at 11.2 degrees plato. It also gives you a potential alcohol % by volume of 6 %, but that is only if you ferment back to a 1.000 gravity, which is near impossible with an average beer. More likely, your final ABV % will be approx. 4 to 4.5 %.
There's a lot of very knowledgable and experienced brewers on this forum, and I'm sure someone will explain it better than my humble self.