Linguistics/ Second Language acquestion/ Errors Analysis

I need to analyse the Swedish students text in their English writing and identify the types of errors and the reasons. types of errors are interlingual errors and intralingual errors such as omission, spelling mistakes, overuse of the progressive form, the use of the wrong tense and subject verb agreement or other errors which I do not remember at the moment. I will attaches a very long texts written by the Swedish students in the junior and senior secondary school, you should not deal with the whole text you can choose only text that contain many errors. furthermore, there are some codes for each text in which you can know the sex and the age of the writer.