Please write an essay of minimum 600 words on the cognition aspects of working memory and attention. You must provide evidence from both methods and for each aspect (so both working memory and attention) you must explain how psychologists have tried to understand them through both experimental research and neuropsychological case studies. The language should be easy to understand with no high unknown words. Please add a nice conclusion. 
Please make sure to write in an easy language so even younger ones can understand it, however the content should be high. For the other order assigned by you the language is still very high so please reword the sentences.