If you use R for those empirical questions, you need to submit a pdf file generated by R markdown. The file should include your answers for each question as well as specific R codes to calculate those answers. Please check the Lab materials if you missed the lab session covered R markdown.
If you use a software package different from R, you need to type your answer and the codes. There also exist markdown methods for Stata, Python, and Matlab. The course will only provide TA sessions for R, so you need to learn appropriate markdown syntax by yourself if you plan to use other software packages.