this is unit 13 assignment A (aim A) of BTEC level 3 applied science. This assignment took me a lot of time and is very well written. All the criteria have been covered. nothing has been copied and pasted from internet. It includes all the calculations, reactions, pictures and content. I achieved all the criteria and got a grade distinction right away. So if you want to get a grade distinction in this assignment, go ahead and use this document. wishes the best for you my friend